Improved support for inspect()ion of volatile properties
Updated placeholder RegExp
Timeline.selectedLayers getter now returns sorted layers
Enabled adding a single element via add()
Added code to skip constructor in inspect(), and renamed illegalProperties to volatileProperties
Context constructor supports Iterator.frame
Fix for URI.isRoot on mac osx.

URI.isRoot would mis interpret URIs on mac osx.
This change converts the URI to a platform path and then tests the
results.
Flash sometime returns URI including the hard drive name...
ie file:///Mac%20HD/foo/bar. The new-ish api FLfile.uriToPlatformPath)
will correctly interpret this as '/foo/bar/'.
More fix to URI for mac osx.
Ignoring lumos_* files.
Added PanelEvent.INTERVAL to the list of listenable events.
Merge branch 'lumos_work' into lumos_master