Initial support for Arrays added.

Not supported yet:
M2 relevant  |  Description
   n         |  ARRAY_GET_STRING
   n         |  ARRAY_SET_STRING
   ?         |  ARRAY_GET_ARRAY
   ?         |  ARRAY_SET_ARRAY
   y		 |  C++ OUT_OF_BOUNDS EXCEPTIONS
Initial Array Support (additional files)
Merge branch 'experimental_backend' of github.com:swp-uebersetzerbau-ss13/fuc into experimental_backend

Conflicts:
	code/backend/test/swp_compiler_ss13/fuc/backend/LLVMBackendTestSuite.java
merge #2 so that new backend tests run