OSMF SVN

- Added new property ( hasErrors) to IHTTPStreamSource interface to signal errors while downloading or processing fragments
- Updated HTTPNetStreamMixer to be more resilient when processing tags
- Updated HTTPNetStreamMixer to block onMetaData/onXMPData packets from alternate track (they were altering the total duration of main media)
- Updated HTTPStreamSource to correctly dispatch script data events to signal errors
- Updated HTTPStreamDownloader to correctly signal download errors
- Removed CONSUME_PASSTHROUGH, CONSUME_UNDECIDED, CONSUME_MIXED from HTTPStreamingState enum
- Updated HTTPNetStream to better differentiate between handlers and sources

[qe] mlm tests update

Fixed Rolling Window bug - windowDuration was not propagated correctly

[QE] MLM tests update default value for rollingwindow

Fix build system failures
- the scripts on the build machines are using classes from flexLibProperties when compiling OSMF.swc

Adding a conditional compiling for an override function

- just added an empty line at the end to test the ability to commit

Small updates to HDS components
- consolidated HDS states [ all HDS classes will use HTTPStreamingState, all other state enumeration classes were removed ]
- updated HTTPNetStream to play media while buffer is between desiredBuffer_Min and desiredBuffer_Max
- updated HTTPStreamingF4FIndexHandler to stop the bootstrap refresh when the HTTPNetStream is closed

[IntegrationTests] Marking as ignore_ DRM tests and parsing tests that fail. To be re added when they are fixed.

Fix FM-1313 (http://bugs.adobe.com/jira/browse/FM-1313)
Enhanced seeking is back and it is always activated.