Added Joiner.accept tests excl. pending cases (FGMN)
Implemented missing Joiner.accept() cases and some coverage cases.
Merge branch 'joiner_unit_test' of git://github.com/DSRCompany/raet into dmitry_1

Conflicts:
	raet/road/test/test_joining.py
Commented out failing tests until can fix underlying problem
Merge branch 'dmitry_1'