Added logic to set the size of souphttpsrc explicitly as soon as it is known for all cases (not just dtcp content).  This fixes an issue where seeks were not working because size was not known because souphttpsrc is no longer issuing HEAD requests in the READY state (only PAUSED or greater).
Merge pull request #22 from cablelabs/set-size-seek-fix

Added logic to set the size of souphttpsrc explicitly as soon as it is k...