[pip] updated/fixed dependencies

many thanks to @jayvdb for pointing those out!

fixes #741

bumblebee_status/modules/contrib/deadbeef.py

@@ -5,8 +5,6 @@ some media control bindings.
 Left click toggles pause, scroll up skips the current song, scroll
 down returns to the previous song.
 
-Requires the following library:
-    * subprocess
 Parameters:
     * deadbeef.format:    Format string (defaults to '{artist} - {title}')
       Available values are: {artist}, {title}, {album}, {length},

bumblebee_status/modules/contrib/spaceapi.py

@@ -9,7 +9,6 @@ an example.
 
 Requires the following libraries:
     * requests
-    * regex
 
 Parameters:
     * spaceapi.url: String representation of the api endpoint