first ast impl
added ast visualizer to gui
test correction
fixed bug in ICG for returns without variables
Merge branch 'master' of https://github.com/swp-uebersetzerbau-ss13/javabite
Merge branch 'master' of https://github.com/swp-uebersetzerbau-ss13/javabite
added test for doubledeclartion in ASTAnayzerTest
nevermind
Merge branch 'master' of
https://github.com/swp-uebersetzerbau-ss13/javabite

Conflicts:
	javabite-compiler/src/main/java/swp_compiler_ss13/javabite/gui/ast/ASTVisualizerJb.java
added method for identifying the content of node
added method for identifying and Operatrion the content of node
symbols for operations in ast inserted
symbols for operations in ast inserted
ast gui modified
added undo redo and added properties file for syntax highlighting
moved toe source files to correct directory
merged
Merge branch 'master' of https://github.com/swp-uebersetzerbau-ss13/javabite
removed dependecy on old interfaces at BranchNode implementation
removed deprecated stub of Type. closed #28