Merge pull request #29 from hkenney/maint/master/add_changelog

(maint) Add CHANGELOG and update for 0.2.0 release

CHANGELOG.md

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+##2015-03-17 - Release 0.2.0
+###Summary
+
+This release includes improvements to the HTML output generated by strings and a few bug fixes.
+All related tickets can be found under the [PDOC](https://tickets.puppetlabs.com/browse/PDOC) JIRA project with the fix version of [0.2.0](https://tickets.puppetlabs.com/issues/?filter=13760).
+
+####Features
+- Custom YARD templates for classes and defined types **(PDOC-17)**
+    - Improved HMTL output that is more appropriate for Ruby code (especially for parameters)
+    - Support for the explicit list of YARD tags we will be supporting initially (@param, @return, @since, @example)
+    - Our own custom YARD templates which can be easily extended and tweaked
+- Custom YARD templates for 3.x and 4.x functions **(PDOC-24)**
+    - Improved HMTL output that is more appropriate for listing several functions on one webpage in addition to being more consistent with the HTML produced for classes and defined types.
+    - Support for the explicit list of YARD tags we will be supporting initially (@param, @return, @since, @example)
+    - Our own custom YARD templates which can be easily extended and tweaked
+- Addition of RubCop Travis CI job to ensure code quality and consistency **(PDOC-8)**
+
+####Bugfixes
+- Puppet namespaces are no longer mangled for nested classes and defined types **(PDOC-25)**
+- Strings is now compatible with the renaming of the Puppetx/puppetx namespace to PuppetX/puppet_x **(PDOC-26)**
+- Strings will no longer crash when documenting 3x functions with less than two arguments passed into newfunction **(PDOC-27)**
+