On high bitrate channels (> 11 Mbit/s) I have seen failures
related to decode buffer size so increase them.

This fixes Sky Italia HD channels. When they send new
code word the one that is about to expire is set to 0
and this causes short decryption failures. Now if code
word is all zeroes it is not set.

Add --cw-warn-time to set how much time to wait before
starting to complain about code words.

This move is in preparation for adding ecm reports.

- Mention man page
- Better examples using long options

With manual setting of emm and ecm pids unknown CA support
is not an issue anymore.

With this fix tsdecrypt now compiles on OS X (tested
on 10.6.8).

Add support for SECA/Mediaguard, Viaccess, Videoguard/NDS, Nagra
and DRE-Crypt.

The libraries are now free software and are hosted on github.com

This is not strictly correct but helps to not spam the logs
with multiple connects per second if camd server is down.

With this patch Bulsatcom irdeto ECM stream can be used
for decoding.