H264: Add support of packetization modes, SVC, MS-H264

Add support for Prefix, STAP, MTAP, NI-MTAP, and PACSI packet types.
Add support for Microsoft SEI messages [MS-H264PF]
Add support for dissecting scalable profiles
SDP: Add profile-level-id decode for payload type H264-SVC
MS-H264PF: http://msdn.microsoft.com/en-us/library/hh659565.aspx
Update #1 - Fix Tabs -> Spaces, Reinsert accidentally removed entry 19
from h264_type_values
Update #2 - Changed to using expert info for exceptions and Microsoft
errata.
Update #3:
  - Correct handling of truncated packets
  - Use guid functions and compare techniques
  - Correct ranges for expert info messages
  - Change to using reported_length from captured_length

Change-Id: I520a3c9a6d85c78a976b520cf5a6a405064a48f1
Reviewed-on: https://code.wireshark.org/review/2580
Reviewed-by: Pascal Quantin <pascal.quantin@gmail.com>