Change digitalscreen packets to use compression

util.Compress is now used to reduce the packet size.
Change digitalscreen packets to use compression

util.Compress is now used to reduce the packet size.
Improve digital screen performance

Can now render a 512x512 image almost instantly with very little lag.
Change pixelbit to pixelbyte

Better fitting names for variables.
Change pixelbit to pixelbyte

Better fitting variable name.
Optional digital screen compression

Address 1048576 now controls whether or not the digital screen should send compressed messages.
Optional digital screen compression

Address 1048576 now controls whether or not the digital screen should send compressed messages.
Removed incorrect comments left over from changes.
Default compression to 1

Seriously. Bandwidth is reduced tremendously.
Cleaned up code a bit and fixed small math error that didn't hurt anything but looked bad.
Merge pull request #647 from thegrb93/master

Change digital screen to use string compression to reduce packet size.