Added popcorntime
Renamed popcorntime-beta to popcorntime, fixed it

The following stuff have been fixed:
 - the package now resides in /usr/share instead of
   /opt
 - the icons have been fixed (deleted unnecessary,
   changed the installation path of it, added to
   sources)
 - added desktop file to sources
 - renamed TOS.txt to LICENSE, added to sources
 - added "zip" to makedepends (build.sh needs it)
 - added myself as maintainer