Added ColorEightByEight class and example program for Adafruit Bicolor LED Square Pixel Matrix with I2C Backpack

Added note about possible pixel indexing bug in the non-color version.  I don't have the non-color version to test with.

Added note about possible unintentional color "blending" bug in the Arduino color version.
(borked previous commit, probably will again..)

Added ColorEightByEight class and example program for Adafruit Bicolor LED Square Pixel Matrix with I2C Backpack

Added note about possible pixel indexing bug in the non-color version.  I don't have the non-color version to test with.

Added note about possible unintentional color "blending" bug in the Arduino color version.
Added ColorEightByEight class and example program for Adafruit Bicolor LED Square Pixel Matrix with I2C Backpack

Added note about possible pixel indexing bug in the non-color version.  I don't have the non-color version to test with.

Added note about possible unintentional color "blending" bug in the Arduino color version.
Added ColorEightByEight class and example program for Adafruit Bicolor LED Square Pixel Matrix with I2C Backpack

Added note about possible pixel indexing bug in the non-color version.  I don't have the non-color version to test with.

Added note about possible unintentional color "blending" bug in the Arduino color version.
Update Adafruit_CharLCD/Adafruit_CharLCD.py

In delayMicroseconds(), sleep(seconds) always equals 0 (get a lot of weird characters on LCD)

in python v2 microseconds / 1000000 = 0
changed to : microseconds / float(1000000)

so sleep(seconds) doesn't always equal 0 (get a lot of weird characters on LCD otherwise)
Fix error string
Merge pull request #14 from mrichardson23/master

Fix IOError string in Adafruit_I2C.py
Merge pull request #13 from rogg/patch-1

Update Adafruit_CharLCD/Adafruit_CharLCD.py - Weird Characters
Added rev auto-check
Fixed OUTPUT and SMBus location problems
Added I2C bus auto-detect override
Fixed registers with 8-bit chips!
Added 8/16-bit helper methods courtesy andig!
Fixed 23008 registers (uses 23017 now)
oops fixed collision on busnum - lets have it only set in the i2c file eh?
fixed up buttonPrssed() function - much nicer now!
test sketch
whew, fixed busnum thingy, also cleaned up global mcp
Fixed MCP23008 registers
Merge branch 'master' of https://github.com/adafruit/Adafruit-Raspberry-Pi-Python-Code