Log registered response template engines and their content types
Log registered bodyparser engines and their accept types
Add JavaDoc to BodyParserEngineManager and TemplateEngineManager
Return an ImmutableSet for content type methods
Add unit tests for getContentTypes()
Move engine logging to the individual managers
Move Router logging to RouterImpl
Replaced tabs with spaces.
Merge branch 'gitblit-logengines' into develop
Add explicit text/plain template engine
Add `text/plain` engine changelog entry

Also deprecate renderRaw(String) and add a Result.text() method to complement the other content type methods.
Add Copyright

close #218
Merge pull request #231 from gitblit/plaintext

Add explicit text/plain template engine
Merge pull request #232 from zephiransas/develop

Add Copyright
Add FreeMarker support for PrettyTime localized relative date formatting
Merge pull request #233 from gitblit/prettytime

Add FreeMarker support for PrettyTime localized relative date formatting
Bump to guice beta5
Preparation for Ninja 3.3.3 release.
[maven-release-plugin] prepare release ninja-3.3.3
[maven-release-plugin] prepare for next development iteration