Replace stdout and logging defines with WLog, add logcat support

Currently there are a number of ways of logging used by freerdp.
This pull request unifies them all to use WLog as backend.

* Wrapper for freerdp ```DEBUG_WARN``` and ```DEBUG_MSG``` to log to WLog.
  * Replaced all ```fprintf``` and ```printf``` in libfreerdp and channels with ```DEBUG_*```
* Added logcat support for ```ConsoleAppender``` and message formatter