The LLVM generator will have little shared internal functionality with the code generating ones, so moved all the string / symbol manipulation to CompiledModelGenerator

git-svn-id: https://roadrunnerlib.googlecode.com/svn/branches/develop@1105 c0027639-9190-0b57-01eb-f09a03790dae
updtes

git-svn-id: https://roadrunnerlib.googlecode.com/svn/branches/feature-llvm@1106 c0027639-9190-0b57-01eb-f09a03790dae
Merge branch 'gdevelop' into gfeature-llvm

git-svn-id: https://roadrunnerlib.googlecode.com/svn/branches/feature-llvm@1107 c0027639-9190-0b57-01eb-f09a03790dae