Tests, lots of them.

Conflicts:
	tests/correct2/assign1T.py
	tests/correct2/assign3T.py
	tests/correct2/assignT.py
	tests/correct2/assignT1.py
	tests/correct2/callT4.py
	tests/correct2/for5.py
	tests/correct2/forT2.py
	tests/correct2/ifexprT1.py
	tests/correct2/ifexprT2.py
Modified many tests. Updated types of dictionaries/attrref

Attribute reference should be a bit more stable.
fixed small bug with rewriteAllocator