Updated JS files to latest versions
Updated x-ray script
Updated URLs
Allowed checked property on inputs
Added safety checks to dependent methods
Added safety checks
Updated checks and gulp file
Debugged some PHP
Added unit tests and PayPal API
Bug fixes
Multiple updates/enhancements

* Update Gulp build
* Switched from icon fonts to SVG
Added favicons. Removed icon fonts.
Switched to $wp_session
Various updates
Don't count lessons without quizes in progress
Updated how archive spacing is applied
Merge pull request #37 from cferdinandi/development

Development