Add case sql expression to models
Change setup.py to use https for Routes dependency
Update minimum lib requirements
Bump rev number to 0.2.2

Conflicts:
	pybald/__init__.py
Merge new pybald-routes requirement into setup.py
Remove old routes link
Fix bug with test client double post
Bump rev to 0.2.4 with bug fix for test client
Merge branch 'master' into dev

Conflicts:
	pybald/__init__.py
	setup.py