SrcML 0.3.1 released

This is the first release of the 0.3 branch of SrcML. The 0.3 branch is still considered to be in alpha stage.

ChangeLog (only for major changes):
* complete architectural change:
* SrcML moved to Eclipse platform
* java parser replaced by the parser from the Eclipse JDT
* SrcML schema recreated from scratch with emphasis on extensibility and language neutrality
* API removed (to reduce maintenance, no point in rewriting Eclipse features either)
* added support for creation of control flow graphs