Finishing codegen test
Added a simple test for labels
And a yet another test for codegen
Started adding assembler tests
Fixing endiannes in codegen visitor and related tests
Simple fix for lines with labels only
One test more
Fibonacci numbers test
A nicer fibonacci program :)
Some safety checks added
Refactored - pulled lexing to separate methods. Parser will now also understand jmp operations, no action taken yet on them though