added .NREWidgetText to Never-Ending progress widget text
"loading" throbber
thanks @gavin19 for most of the work
replace spinning gears with RESThrobber in progress widget
replace gears with RESThrobber in author info, subreddit info, "NRE restoring your place" popups
.RESThrobber -moz-animation for compatibility
periwinkle throbber
Merge pull request #662 from andytuba/issue_662

Replace spinning gears throbber .gif with CSS3 throbber