Merge branch 'master' into garth/test-updates-for-interface-changes

Conflicts:
	test/unit/fem/python/Assembler.py
Remove more deprcated code from tests.
Remove deprecated mesh domain code.
Merge branch 'garth/test-updates-for-interface-changes' into garth/fix-issue-119

Conflicts:
	test/unit/fem/python/Assembler.py