AvInputVideo: fix missing frame when transcoding (flush decoder buffer)
AvInputAudio: flush decoder buffer at the end of the transcode process
Merge pull request #19 from valnoel/develop

Video / Audio: fix missing frames when processing with codec with latency
Merge branch 'develop' of https://github.com/mikrosimage/avTranscoder into dev_polish_tuttle
Log: the default behavior is to log nothing

* Add verbose attribute to some classes to avoid print in common case.
* Waiting for a log system...
Use flags when create a context for setting profile