This is the first commit. but it is rather a backup.
Basic implementation of wave to png.
The command is now working as expected !
 - Implementation of the WaveForm::render method,
 - Fix some issue in the WaveFile::setSource method,
 - Command line parsing.
Remove audiograph.pro.user.

Signed-off-by: NealRame <contact@nealrame.com>
Change the content  of README.md

Signed-off-by: NealRame <julien@graziano.fr>
Merge branch 'master' of github.com:NealRame/audiograph