[maven-release-plugin] prepare release tincan-0.3.1
[maven-release-plugin] prepare for next development iteration
Merge branch 'master' of https://github.com/RusticiSoftware/TinCanJava
Update main readme
Fix bug in JSON marshalling for the category context activity.
Correct 'statement' type in Context

* Switch from 'SubStatement' to 'StatementRef'
Merge pull request #19 from brianjmiller/master

Correct 'statement' type in Context
Add exception for lower TCAPI versions.
Update doc comment only
Merge pull request #16 from RusticiSoftware/category-json-marshalling

Fix bug in JSON marshalling for the category context activity.
Merge branch 'master' of https://github.com/RusticiSoftware/TinCanJava
Add manifest