Fixed encoding for LPD6803

The encoding for the LPD6803 is the following:
Wake bits: 32 bits at 0
Data bits - 16 bits per pixel (1 + 5 Red + 5 Green + 5 Blue)
Latch bits: 1 bit per pixel (in blocks of eight, because I couldn't figure out how to send solo bits)

This seems to work in all of the different modes that I tried, namely chase, fade, all_off, and all_on.
I found it easiest to just call the bytearray of the length I wanted.