grammata version 0.1.8.2

CHANGES
    - fixed bug which overwrote f with p in procTest.gr

TODO
    - handle return statements in procedures
    - rearrange module structure

modified:   src/General.hs
modified:   src/General/Environment.hs
modified:   src/Grammata.hs
modified:   src/Grammata/Execution.hs
modified:   src/Grammata/Parser/AST.hs