Some miscellaneous cleanup while review the diff vs master

Fixed a blind cast to VideoItem in HTTPGetHandler
Restored HTTPRequest.uri to "protected" access
Fixed a couple copyrights/author tags.
Merge branch 'cablelabs/master' of github.com:cablelabs/rygel into cablelabs/master
Renamed/split PlaySpeed-related classes

Per feedback on gnome bugzilla 710628, split DLNAPlaySpeed.vala (which had
 3 classes) into three separate files and removed some methods on PlaySpeed
 class (is_trick_rate() and is_negative()) since is_normal_rate() and
 is_positive() can be used to accomplish the same.

Took "DLNA" off DLNAPlaySpeedRequest and DLNAPlaySpeedResponse.

Did a couple tests with TimeSeekRange, PlaySpeed, and both in the same request.
Renamed/split HTTPSeekRequest & HTTPResponseElement classes

Per feedback on gnome bugzilla 710628, split classes defined in
 rygel-http-byte-seek.vala and rygel-http-time-seek.vala into their
 own files to maintain the one-class-to-one-file Rygel convention.

Did a couple tests with TimeSeekRange, PlaySpeed, and both in the same request.
Added index file entry checks to ODIDMediaEngine

Added some additional checks to the index file parsing code to
 handle ill-formed index files more robustly.

Tested with some index file entries with added/missing space
 on first/last entries.
Cleanup of whitespace and copyright text for MediaObject classes
Cleanup of whitespace and copyright text for HTTP processing logic
Cleanup of whitespace and copyright text for ConnectionManager changes
Cleanup of whitespace and copyright text for MediaExport changes
Cleanup of whitespace and copyright text for upload option control changes
Cleanup of whitespace and copyright text for Gst/SimpleMediaEngines
Cleanup of whitespace and copyright text for ODID MediaEngine
Cleanup of whitespace and copyright text for ODID MediaServer
Cleanup of whitespace and copyright text for the media renderer plugin
Cleanup of whitespace and copyright text for the Tracker MediaServer
Removed whitespace-only lines and fixed a couple stray copyrights
Merge pull request #6 from cablelabs/cablelabs/parthi

Remove DLNA.ORG_OP dependency when building SinkProtocolInfo. This is a ...
Fix 7.2.12.2(DIAGE) : Remove unused state variable A_ARG_TYPE_DateTime
CVP2RI-239 : allow for item files without odid_uri properties.  Assumes parent directory as top level ODID directory, doesn't create containers for resource directories.
Fix UPnP CTT CM:1-1.1: Handle empty network value to avoid incorrect protocolInfo publishing