UNCOMPILABLE grammata version 0.1.7.8

CHANGES
    - Added AST for expressions
    - Parser works again

TODO
    - Conversion from AST to Grammata-action.
	modified:   src/General.hs
	modified:   src/General/Environment.hs
	modified:   src/Grammata.hs
	modified:   src/Grammata/Parser.hs
	modified:   src/Grammata/Parser.y
	modified:   src/Grammata/Parser/AST.hs