update code/common
add Testcase for Symboltable
add testcase to symboltable
add impl for symboltable
added necessary files to my symboltable source
added a diagram showing the design for the parser, and the classes it uses.
Keine Ahnung, was ich gerade mache Merge branch 'parserExperimental' of https://github.com/swp-uebersetzerbau-ss13/fuc into parserExperimental

Conflicts:
	code/common
testcase and symboltable complete
Merge branch 'parserExperimental'

add symboltable to master