Testing: Change SauceLabs test runner back to Mocha

Cleaned up the JS from the previous update to the runner, and tighten the JSCS config to prevent the spaces from creeping back in.
Merge pull request #5873 from nschonni/sauce-labs-mocha

Testing: Change SauceLabs test runner back to Mocha
Added a fix to prevent random failures of some data-inview test cases
Merge pull request #5874 from LaurentGoderre/fix-data-inview-test

Added a fix to prevent random failures of some data-inview test cases
Country content: Added documentation
Merge pull request #5875 from pjackson28/addcountrycontentdocs

Country content: Added documentation
Fixed various markup issues
Merge pull request #5876 from pjackson28/fixvariousmarkupissues

Fixed various markup issues
WET theme: Localized placeholder content and generated index pages
Merge pull request #5877 from pjackson28/fixthemei18nexamples

WET theme: Localized placeholder content and generated index pages
Fixed the data-inview tests for IE 11
Added jquery-sheetrock as a dependency for use in a future plugin
Merge pull request #5880 from pjackson28/buildleaderboard

Added jquery-sheetrock as a dependency for use in a future plugin
Merge pull request #5881 from LaurentGoderre/fix-browsers-test

Fixed the data-inview tests for IE 11
SauceLabs: Add browsers to the matrix

- Bump the OSX version so Safari 7 will be used
- Add OSX FireFox
- Add additional IE versions
SauceLabs: Test additional recording configs
Travis: Don't repeat the failed SauceLabs tests
SauceLabs: Add better testname from Git
Temporarily exclude sauce testing in IE until test are fixed
Documentation: Updated the browser testing recommendations