Added lambda to the stack/backend
Merge branch 'intertarget-code' of https://github.com/SWP-Ubau-SoSe2014-Haskell/SWPSoSe14 into intertarget-code

Conflicts:
	src/RailCompiler/FunctionDeclarations.hs
	src/RailCompiler/IntermediateCode.hs