Updated to use bootstrap library to render video/photo upload progress bar
Updated to use new UploadProgress class. Also added logic to delete existing progress data
Updated logic to use bootstrap upload progress bar
Styles related to upload progress bar uploaded to    bootstrap classes. Classes renamed to avoid conflicts with pre-existing classes of same names such as progress-bar
Updated to use method on UploadProgressListener
Updated to set the default percentage as 1 %
Removed  import of a class which is not in use
Updated to use a method of KalturaSessionUtils to get kaltura session id
Updated to use new method to get kaltura session
Removed changes related to kaltura session
Fixed a typo in a method name
Merge branch 'feature/kaltura' of https://github.com/perfectsense/brightspot-cms into feature/kaltura