updates

git-svn-id: https://roadrunnerlib.googlecode.com/svn/branches/develop@1306 c0027639-9190-0b57-01eb-f09a03790dae
removed dead code, restructure ModelDataIRBuilder to make more sense, implement evalReactionRates, can fully create LLVMExecutableModel

git-svn-id: https://roadrunnerlib.googlecode.com/svn/branches/develop@1307 c0027639-9190-0b57-01eb-f09a03790dae
Merge remote-tracking branch 'origin/gdevelop' into gdevelop