Support of some H264 packetization modes

Support for H264 Single NAL Unit mode and partial support to Non-interleaved mode.

Full support of Non-Interleaved (i.e. adding missing type STAP-A) is planned.
Interleaved mode support will depend on demand.

v0.5.0: Version 0.5.0

Codecs supported

• AMR
  Narrowband and wideband.
  Single channel, single frame per packet
  octet-aligned and bandwith-efficient modes