Created utility parse methods to parse both byte and npt ranges.  Started adding support for availableSeekRange header which is used with live streaming content.  Added dlna_src_is_dtcp_encrypted() to make checks for encrypted content simpler.  Got rid of extraneous {}.  Replaced some methods with general purpose parse utilities.
Merge pull request #26 from cablelabs/parse-utilities

Created utility parse methods to parse both byte and npt ranges.  Starte...