Added 2 API functions to the feature:
Join both APIs to one function that gets a number or a string :
'faster','fastest','slower','slowest'
remove id from the combo ul tag
switched to kWidget.addReadyCallback, fix bug where the end user clicked on a change rate button before the player loaded
exposed new notification and implement it as log in the test page
Merge pull request #458 from kaltura/enhanced-playback-rate

Enhanced playback rate