A few updates to plugins:
UserButton:
 1) When creating links, always create them in ~/.lumina/favorites
 2) Scan both the Desktop and the favorites dir for favorite items
 3) Distinguish between removing a link and deleting a file
 4) Allow for setting links to directories
 5) Allow removing links to directories
AppLauncher desktop plugin:
 1) Make sure to use the session function for launching an item (makes the mouse cursor show the loading icon).
 2) Allow for pre-defining a file path for the launcher (syntax: applauncher::<path to file>)
Merge branch 'master' of github.com:pcbsd/lumina