LED Strip (sorry the branch name is still neopixel_strip)

Here is the pull request for the generic version from [here](https://github.com/firmata/arduino/issues/167)
Use [Encoder7Bit](https://github.com/firmata/arduino/blob/configurable_dev/utility/Encoder7Bit.cpp) instead of the TOBYTE macro. You can refer to [OneWireFirmata for examples of use](https://github.com/firmata/arduino/blob/configurable_dev/utility/OneWireFirmata.cpp#L65-L72).