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)
Somewhere in this function you need to set the pin mode or the pin mode of LED_STRIP will not be set properly for the device. See the [these lines in EncoderFirmata]()https://github.com/firmata/arduino/blob/configurable_dev/utility/EncoderFirmata.cpp#L50-L51 for an example. You also need to be sure to respect IGNORE pins. [See an example here](https://github.com/firmata/arduino/blob/configurable_dev/utility/EncoderFirmata.cpp#L103-L106). In most cases there will not be a collision with IGNORE. The reason it was introduced is if a SPI device such as an ethernet or wi-fi controller are used, you can have conflicts with other Firmata features that may try to use one of the pins needed by the SPI interface.