Added the beginnings of the navigation tests

I still need to refactor the methods but at this point, all tests work
Merge branch 'master' into jonahstanley/add-navigation-tests
Refactored Navigation Methods
Fixed errors in spacing and refactoring out of scenario
Fixed the need of a global variable
Fixed naming issue and hopefully clicking issue
Cherry pick change to url matching regular expression. Fixes LMS-37
Fixed weird issue of needed to sometimes first find then click instead of css_click
Fix a few remaining tz naive dates

And remove redundant but != date parsing methods. In process make
the general parsing function less lenient (don't default date nor
month)
Updated `diff-cover` to version 0.1.2, which fixes a bug
in which missing lines were over-reported
Fix a few remaining tz naive dates

And remove redundant but != date parsing methods. In process make
the general parsing function less lenient (don't default date nor
month)
Merge branch 'dhm/timeconv/bug0' of github.com:edx/edx-platform into dhm/timeconv/bug0

Conflicts:
	common/lib/xmodule/xmodule/fields.py
	common/lib/xmodule/xmodule/timeinfo.py
timezone conversion tests
timezone conversion: more unit tests

and code reorganization
need to import os
python tests for videoalpha
Add tests for Youtube part of Videoalpha
Add tests for HTML5 part of Videoalpha
Add tests for Event Logger
Disable tests because of problems with phantomjs