color as argument in blink

blink method now takes two arguments, color and options
color is moved from options hash to own argument for easy use
BlinkStickTest: Tests available for all class methods
update guidelines for contributing
bump version to 0.1.0
added CHANGELOG
Merge pull request #5 from bjoska/blink_stick_tests

BlinkStickTest: Tests available for all class methods
move parse test to color_test. Closes #3
remove leftover color gem dependency