Fix undefined del. Move lib loading to function.
Fix undefined del. Move lib loading to function.

Moves the library loading code to a separate function so that it doesn't need to
delete unwanted globals.

Signed-off-by: Olivier Aubert <6156ad34beef884227e9079455af537dce64089d@liris.cnrs.fr>

metakermit/vlc-bindings-python,oaubert/python-vlc,geoffsalmon/vlc-python,oaubert/python-vlc,geoffsalmon/vlc-python,pombreda/git.videolan.org-vlc-bindings-python,pombreda/git.videolan.org-vlc-bindings-python,kermit666/vlc-bindings-python,metakermit/vlc-bindings-python,kermit666/vlc-bindings-python