In the AVR assembly, swapped the order that red and green are sent to make this library work nicely with the new WS2812B LED strips.
Updated the ARM version of the code to have green and red flipped.  I basically copied this code from our mbed library.
Updated some comments in the examples so that they are still useful but will be less likely to get outdated when someone modifies the code.
Changed the reset delay from 24 microseconds to 50 microseconds because the WS2812B datasheet specifies 50 microseconds (though experimentally it seems like 6 microseconds would be enough).
Updated the README for the new WS2812B LED strips.
README.textile: Added the fact that version 1.2.0 can also work with the WS2812B LED strips.
Updated the README for the new LED strip names and changed the release date to today.