Removed some debug texts

There's still some problems on the workflow rendering if we specify a
length.

Now media isn't cloned from on vlcmedia to another, since they share
options. A new one is creater from scratch.

Snapshot is working, it just misses the workflow integration.

Extension are now stored in a specific place. FileType is now really
used in the GUI, and not hardcoded.

We now have a clean shutdown process, or at least it doesn't crash :o)

Next/previous frame is only usable when paused.
Added .o, .so, and include/ dir to .gitignore

Module now also have an internal representation that allows us to keep
data private. Don't know if this will be used though, but i'd rather do
this now than three month from now :)