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
Fixed weird issue of needed to sometimes first find then click instead of css_click
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
Add tests for additional events
As per PR comments from reviewer, fixing coding style.
Added comment about enabling some Video Alpha tests when testing locally. Updated CHANGELOG.
Fixed up CHANGELOG.
Fixed up CHANGELOG.
Merge pull request #101 from edx/anton/videoalpha_tests

Anton/videoalpha tests
Merge pull request #58 from edx/jonahstanley/add-navigation-tests

Jonahstanley/add navigation tests
Fix merge conflict in CHANGELOG.rst.