Add support for Cleveland Music Co Hothouse

[chipaudette]

There is currently no easy Arduino support for the Cleveland Music "Hothouse" pedal, which uses the Daisy Seed. This pull request adds the support.

My approach was to make the Hothouse look like another Daisy variant. So, all that is needed to access the Hothouse is:

hw = DAISY.init(CLEVELAND_HOTHOUSE, AUDIO_SR_48K);

Then, you access the pots, switches, and LEDs just like you would with the Daisy Petal:

float value= hw.controls[0].Value();  //potentiometers...[0] through [5]
bool on_off = hw.buttons[0].Pressed();  //switches [0] and [1] are the footswtiches.  Toggle switches are [2] through [7]
hwl.SetFootswitchLed(0, HIGH);  //set footswitch LED on or off (0 for left, 1 for right)

Might you accept a pull request to support hardware that is not entirely yours?

[chipaudette]

For anyone who has a Hothouse, an easy test using this branch is to pull up the "CombFilter" example for the Daisy Petal. In the Arduino-style setup() function, change the one init line to be petal = DAISY.init(CLEVELAND_HOTHOUSE, AUDIO_SR_48K);. Then, compile and run!