Make request headers multivalued and add getParameterValues.
Add Context attributes.
Add @Attribute with its ArgumentExtractor
Merge pull request #86 from tbroyer/context-attributes

Context attributes and multivalued headers
Some docu update
Merge branch 'develop' of github.com:reyez/ninja into develop
replaced default freemarker templating engine with freemarker-gae for appengine compatibility
Final changes for 1.3
[maven-release-plugin] prepare release ninja-1.3
[maven-release-plugin] prepare for next development iteration
new change log
Better docs