Merge pull request #2 from cycloon/master

Implement command "empty" and add a compile fix for Arduino 1.0
Added translation of datasheet

Automatic translation of Chinese datasheet by Google Translate in MacOS
version of Chrome browser. Saved to pdf.
readme.txt identifies the file as an automatic translation of the
datasheet.
typo assignment fix
Merge pull request #1 from adafruit/master

Is this how to import changes from parent of forked tree?