start of code generators

git-svn-id: https://roadrunnerlib.googlecode.com/svn/branches/feature-llvm@1217 c0027639-9190-0b57-01eb-f09a03790dae
start of code generators

git-svn-id: https://roadrunnerlib.googlecode.com/svn/branches/feature-llvm@1218 c0027639-9190-0b57-01eb-f09a03790dae