add setCoverage to ASTNodeImpl
changed unsigned numeric values to signed numeric values and changes exception handling
added a first bunch of tests for M2
empty input error fixed
Merge remote-tracking branch 'origin/master' into semantic_analyzer
extended and revised tests
Semantic Analyser: Fixed encoding.
Semantic Analyser: Detect “break outside of loop”
Semantic Analyser: Detect “type of return”
fixed inequal relation bug
m2test
Bugfixes IntermediateCodeGenerator, M2 Junit Tests
Bug fix in symbol table and more intermediate code generator junit tests
adding Junit Tests
Semantic Analyser: Added simple type checks
fixes NullPointer for empty return
added c style escaping to irgen, more junit tests for irgen
fixed defect test
More Tests and Bugfixes,change readme.md
change Readme.md