Move out cfg_stable structure into its own header out of rtpp_defines.h.
GC "rtpp_log.h", it's not used anymore here.
GC stdint.h.
DEFINE_METHOD is now belongs to rtpp_types.h.
Start implementing detailed stats collection for all kinds of
runtime stats. For now that put barebone API, which later on would
be hooked into command processing and actual RTP processing.
Add rtpp_stats.[ch] and rtpp_cfg_stable.h.
Re-gen after adding few new files.
Add rtpp_stats_obj.
Init rtpp_stats.
Correct description of npkts_played.
o Add "npkts_resized" stat, to track number of packets passed on
for resizing;

o implement 3 more methods into rtpp_stats object, which makes it
actually usable:
 - getidxbyname()
 - updatebyidx()
 - getlvalbyname().
Implement all npkts_xxx counters (npkts_rcvd, npkts_played,
npkts_relayed and npkts_discard). Use first 3 to replace
old cf->packets_in / cf->packets_out in the "info"
command. More advanced "stats" command is coming.
Add updatebyname() method.
Use /dev/urandom, to not block on startup.

Issue:	        #4
Reported by:	oteren
Move bunch of getidxbyname method calls into its own env.
Implement counters:

- ncmds_rcvd
- ncmds_succd
- ncmds_errs
- ncmds_repld

- nsess_created
- nsess_destroyed
Implement counters of double type in addition to uint64_t counters.
Track session initialization timestamp.
Update total_duration counter.
Update nsess_nortp, nsess_owrtp, nsess_nortcp and nsess_owrtcp
counters.