changes from 26/1/2014.

Changelog:
2014.02.26:
- Updated the H.265/RTP implementation to remove the "tx-mode" attribute, to conform to the latest
  version of the H.265 RTP payload format specification.
- Added a new function "OutPacketBuffer::increaseMaxSizeTo()" that sets "OutPacketBuffer::maxSize"
  to a new value only if it's bigger than the current value.  Thanks to Michael Brimer for
  motivating this.
- Fixed a couple of minor code 'nits' that Nikolai Vorontsov discovered using a code analyzer.