Implement name fetching capabilities for Webkit and Quicktime plugins
Adds support for new PluginAPI message (MEDIA_EVENT_NAME_CHANGED) that updates the "title" of the media. In WebKit plugin this is the contents of the <title> tag. In The QuickTime plugin it is the "display name" from the movie meta data
Made the "loaded_duration" parameter also implicitly set the progress percentage and send out MEDIA_EVENT_PROGRESS_UPDATED messages when it changes.
Made the quicktime plugin set the "loaded_duration" parameter in its update messages.
svn merge -r 129913:131718 svn+ssh://svn.lindenlab.com/svn/linden/branches/pluginapi/pluginapi_05
Some branch shenannigans in the pluginapi_05 branch caused this to become a two-part merge.
callum