Metadatas folder: rename it to mediaProperty (in lowerCamelCase)
Rename Profiles folder to profile
Transcoder folder: to lowerCamelCase
Add swig folder

Contains specific files concern by the binding in general: avException
and avExport.
Add option folder

Contains files concern by the FFmpeg / libav options.
Rename Description file to Library

Give the same name as the included class.
Rename Print file to printMediaProperties

LowerCamelCase for file with a list of classes or functions.

Conflicts:

	app/cpp/avMeta/avMeta.cpp
	app/cpp/avplay/AvReader.hpp
	src/AvTranscoder/mediaProperties/Print.hpp
	src/AvTranscoder/mediaProperties/printMediaProperties.hpp
	src/AvTranscoder/mediaProperty/Print.hpp
Frame: remove virtual from functions

We do not want the user to redefine in a derived class the basic
functions to manipulate DataBuffer.
Rename InputStream class to IInputStream

* Also remove default constructor (automatically generated).
Rename InputStream file to IInputStream
Rename DummyVideo / DummyAudio classes to GeneratorVideo / GeneratorAudio

* Also rename attributes and local variables about dummy:
     * Transcoder.
     * StreamTranscoder.
Rename DummyVideo / DummyAudio files to GeneratorVideo / GeneratorAudio
Rename InputVideo / InputAudio classes to AvInputVideo / AvInputAudio
Rename InputVideo / InputAudio files to AvInputVideo / AvInputAudio
Rename OutputEssence class to IOutputEssence
Rename OutputEssence file to IOutputEssence
Rename OutputVideo / OutputAudio classes to AvOutputVideo / AvOutputAudio
Rename OutputVideo / OutputAudio files to AvOutputVideo / AvOutputAudio
CMake avplay: do not build the app if OpenGL or GLUT are not found

* Print a warning if avplay app can't be built.
* Allow the user to build avTranscoder library even if dependencies of
this app are not found.
* fix #94
ProgressListener: add IProgress class

* Base class of all possible Progress.
* ProgressListener inherits this base class.
* Add documentation.
* Swig: add feature "director" to the base class.