The call tree is not cleared any more but updated.

Conflicts:

	src/managerimpl.cpp

Thanks

Conflicts:

	.gitignore
	src/Makefile.am
	src/managerimpl.cpp

Working DBus

We can now retrieve files from the git repository without passing them
through `asciidoc`. This allows us to retrieve images, etc..

- Attempt to implement image rendering.

Shortened the sleep() call in the thread, so that we could have less latency
when calling sendAudioFromMic(), since we check to have a full buffer before
sending.

Le tout est synchronisé avec le Manager, pour qu'on traite l'audio
et qu'on prenne le micro seulement quand c'est notre appel qui est en
cours.

IAX: Fix hangup SEGFAULTing the iax sound subsys + Add samplerate conversion to Mic output (still non-working)

Adding samplerate conversion and sound output fixed the problems of the
Jitter Buffer. It seems it updates the timestamps and causes less empty
packets crashing the system.

* Removed some debugging output.
* Cleanups

Added documentation.

Conforming to:
http://tools.ietf.org/id/draft-guy-iax-03.txt