CHANGELOG and misc repo changes:

- clairfy versioning of project to (now) use semver2
- Switch CHANGELOG format to follow good practices from http://keepachangelog.com
- lock chef gems to chef 12 in preperation for dropping chef 11 support.

CHANGELOG.md

 # CHANGELOG for sumologic-collector
+This project adheres to [Semantic Versioning](http://semver.org/).
 
-This file is used to list changes made in each version of sumologic-collector.
+This CHANGELOG (now) follows the format listed at [Keep A Changelog](http://keepachangelog.com/)
 
-## 1.2.21
-* Merged PR#125, 130
+## [Unreleased]
+### Added
+- allow setting max_memory to control memory consumption : PR#128 (@dannenberg)
+- allow pinning version of chef-vault gem : PR#123 (@dhui)
 
-## 1.2.20
-* Undo PR#113
+### Changed
+- make travisci tests do what users expect them to : PR#134 (@majormoses)
+- updates for ubuntu 16.04, chef 13, fewer restart notifications, configure more java properties, misc kitchen platform updates : PR#122 (@RoboticCheese)
+- misc CHANGELOG updates : PR#137 (@majormoses)
 
-## 1.2.19
-* Merge PR#113
 
-## 1.2.18
-* Adds the ability to define the source categories for the default files created in the json source
-  folder.
-
-## 1.2.17
-* Merged PR#85,86 : Add service retries attempts and delays, fixed online help doc link.
+## [1.2.21] - 2017-06-12
+### Changed
+- appease CI, misc repo cleanup : Merged PR#125, 130 (@zl4bv, @majormoses)
 
-## 1.2.15
-* Merged PR#76,77: Fix [issue 61](https://github.com/SumoLogic/sumologic-collector-chef-cookbook/issues/61) and Chef 11 incompatibility in metadata.rb
+## [1.2.20] - 2017-04-26
+### Changed
+- revert buggy changes: Undo PR#113 (@duchatran)
 
-## 1.2.14
-* Merged PR#74: Add :disable  and :enable action to sumologic-collector, among other things.
+## [1.2.19] - 2017-03-29
+### Changed
+- prevent unnecessary collector restarts by only converge if changed  : Merge PR#113 (@dannenberg)
 
-## 1.2.13
-* Merged PR#72: Use the net command to restart, start, and stop the
-  collector on windows
+## [1.2.18] - 2017-02-07
+### Added
+- Adds the ability to define the source categories for the default files created in the json source
+  folder.
 
-## 1.2.12
-* Merged PR#71: Add a new sumologic_collector resource.
+## [1.2.17] - 2016-07-19
+### Added
+- Add service retries attempts and delays, fixed online help doc link : Merged PR#85,86 (@kquinsland, @meringu)
 
-## 1.2.11
-* Fixed issue 68 with PR#67
+## [1.2.15] - 2016-05-26
+### Fixed
+- Fix windows service collector name [issue 61](https://github.com/SumoLogic/sumologic-collector-chef-cookbook/issues/61): Merged PR#77 (@wenwolf)
+- Chef 11 compatibility improvements : Merged PR#76 (@elyobo)
 
-## 1.2.10
-* Added LWRP resources per PR#64
+## [1.2.14]
+### Added
+- Add `:disable`  and `:enable` actions to sumologic-collector, among other things: Merged PR#74 (@KierranM)
 
-## 1.2.9
-* Platform-family-specific install recipes
-* Windows 2008r2 and 2012r2 support and testing
+## [1.2.13]
+### Fixed
+- Use the proper net command to restart, start, and stop the collector on windows: Merged PR#72 (@KierranM)
 
-## 1.2.8
-* Debian 8.1 support and testing
+## [1.2.12] - 2016-04-19
+### Added
+- Add a new `sumologic_collector` resource :  Merged PR#71  (@KierranM)
 
-## 1.2.7
-02/19/2016
-* Add action for debian 8.X
-* Add support for ChefVault
-* Ensure sumo-collector is running
+## [1.2.11] - 2016-03-21
+### Fixed
+- fixing typo with `forceTimeZone` : PR#67 (@zl4bv)
 
-## 1.2.6
+## [1.2.10] - 2016-03-04
+### Added
+- Added LWRP resources for source config files :  Merged PR#64 (@zl4bv)
 
-* Add support for restarting the collector on `Windows`
+## [1.2.9] - 2016-02-25
+### Added
+- Platform-family-specific install recipes
+- Windows 2008r2 and 2012r2 support and testing
 
-## 1.2.5
+## [1.2.8] - 2016-02-19
+### Added
+- Debian 8.1 support and testing
 
-* Add basic serverspec
+## [1.2.7] - 2016-02-19
+- Add action for debian 8.X
+- Add support for ChefVault
+- Ensure sumo-collector is running
 
-## 1.2.00:
+## [1.2.6]
+### Added
+- Add support for restarting the collector on `Windows`
 
-* Updated cookbook to support Access IDs and Keys
-* Updated cookbook to support Local Collector Management and JSON directory option.
+## [1.2.5] - 2015-10-08
+### Added
+- Add basic serverspec testing
 
-## 0.1.0:
+## [1.2.0]
+### Added
+- Updated cookbook to support Access IDs and Keys
+- Updated cookbook to support Local Collector Management and JSON directory option.
 
-* Initial release of sumologic-collector
+## [0.1.0] - 2015-09-02
+- Initial release of sumologic-collector
 
 
 - - -
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+
+[Unreleased]: https://github.com/SumoLogic/sumologic-collector-chef-cookbook/compare/v1.2.21...HEAD
+[1.2.21]: https://github.com/SumoLogic/sumologic-collector-chef-cookbook/compare/v1.2.20...v1.2.21
+[1.2.20]: https://github.com/SumoLogic/sumologic-collector-chef-cookbook/compare/v1.2.19...v1.2.20
+[1.2.19]: https://github.com/SumoLogic/sumologic-collector-chef-cookbook/compare/v1.2.18...v1.2.19
+[1.2.18]: https://github.com/SumoLogic/sumologic-collector-chef-cookbook/compare/v1.2.17...v1.2.18
+[1.2.17]: https://github.com/SumoLogic/sumologic-collector-chef-cookbook/compare/v1.2.16...v1.2.17
+[1.2.16]: https://github.com/SumoLogic/sumologic-collector-chef-cookbook/compare/v1.2.15...v1.2.16
+[1.2.15]: https://github.com/SumoLogic/sumologic-collector-chef-cookbook/compare/v1.2.14...v1.2.15
+[1.2.14]: https://github.com/SumoLogic/sumologic-collector-chef-cookbook/compare/v1.2.13...v1.2.14
+[1.2.13]: https://github.com/SumoLogic/sumologic-collector-chef-cookbook/compare/v1.2.12...v1.2.13
+[1.2.12]: https://github.com/SumoLogic/sumologic-collector-chef-cookbook/compare/v1.2.11...v1.2.12
+[1.2.11]: https://github.com/SumoLogic/sumologic-collector-chef-cookbook/compare/v1.2.10...v1.2.11
+[1.2.10]: https://github.com/SumoLogic/sumologic-collector-chef-cookbook/compare/v1.2.9...v1.2.10
+[1.2.9]: https://github.com/SumoLogic/sumologic-collector-chef-cookbook/compare/v1.2.8...v1.2.9
+[1.2.8]: https://github.com/SumoLogic/sumologic-collector-chef-cookbook/compare/v1.2.7...v1.2.8
+[1.2.7]: https://github.com/SumoLogic/sumologic-collector-chef-cookbook/compare/v1.2.6...v1.2.7
+[1.2.6]: https://github.com/SumoLogic/sumologic-collector-chef-cookbook/compare/v1.2.5...v1.2.6
+[1.2.5]: https://github.com/SumoLogic/sumologic-collector-chef-cookbook/compare/v1.2.4...v1.2.5
+[1.2.4]: https://github.com/SumoLogic/sumologic-collector-chef-cookbook/compare/v1.2.3...v1.2.4

Gemfile

@@ -3,7 +3,8 @@
 source 'https://rubygems.org'
 
 gem 'buff-extensions', '~> 2.0'
-gem 'chef'
+gem 'chef', '~> 12.0'
+gem 'chef-zero', '~> 5.3'
 gem 'chefspec'
 gem 'kitchen-inspec'
 gem 'kitchen-vagrant'