add windfriendly tests
allow non-unique dates in NE tests
tweaked login page language
Merge branch 'develop' of https://github.com/Gavin-McCormick/watttime into develop

Conflicts:
	windfriendly/tests.py
Merge branch 'develop' of https://github.com/Gavin-McCormick/watttime into develop
Merge branch 'develop'