merged comments from 4.3-refactored
replaced misused constants with constants set via WordPress API
converted double quotes to single quotes where appropriate
modifications designed to ease the refactoring process
first refactoring
prefix class methods
merged fix for CRM-12404: 2f1fa6031c0952c51b16ee9d330bb0e21d30aa4b
prettify with a bit more whitespace
further commentary on theme overriding
further inline comments
take the instance out of global scope
added links for developers
fixed incorrect call to static variable
added translation capabilities
add copyright to js file
add informative actions
add translation capability
commentary
removed register_directories util
fixed some error message formatting