Start Interpret
megre with new AST
little changes
merge Interpreter conflict
no Instance of interpretation
Add content in each block, parent in each Statement, interpret assign and declaration
add variable interpret
complete test for forStatement
change Val type to ADT
merge with AlexMitenev-master
Merge pull request #12 from AlexMitenev/master

Add Interpret
Merge branch 'master' of https://github.com/mbryksin/projectJANE into Parser-branch
complete parser