Developers JS registers in simplecache now
Better naming convention for developer tools javascript
Fixes #4636: Transparent corners for walled garden backgrounds.
Fixes #4791. elgg_get_friendly_time function is supporting future dates now.
Refs #4791. Added $current_time parameter to elgg_get_friendly_time function.
Refs #4791. Written unit tests for elgg_get_friendly_time.
refactored unit tests to never break due to current second change
Reversing page title and site title to match SEO best practices.
Using HTML5 email and url types where available, letting modern browsers provide context sensitive input validation.
Adding translations for a couple of error messages I've encountered in various installs.

This is probably a non-exclusive list, so you might want to add more from /languages/en.php
Fixing whitespacing
Pushing get_data(_row) into db class
Refs #4553: Converts *_data DB manipulators to their OO counterparts.
Fixes some test typos
Fixes documentation errors
Refs #4553: Moves getTables into ElggDatabase object
Refs #4553: Pushes the rest of the appropriate functions into the new ElggDatabase class
Refs #2110. Added Minfy as vendor.
Fixes #2110. Added hook handler to minify css and js when generating simplecache.
updated Minify libs, add settings for enabling JS/CSS minification