Made ASTImpl.toString(...) static and used it in ASTComparator
Added
<jvmarg value="-Dfile.encoding=UTF-8"/>
to the junit-class in the run-tests target
Added new parser-test
Working commit: Started refactoring of ReduceImpl - LRParser
Merge branch 'parser' of https://github.com/swp-uebersetzerbau-ss13/fuc
into parser

Conflicts:
	code/parser/src/swp_compiler_ss13/fuc/parser/parser/ReduceImpl.java
	code/parser/test/swp_compiler_ss13/fuc/parser/parser/ReduceImplTest.java
Changed error handling in ReduceImpl and adjusted LRParser accordingly