v0.7.20
v0.7.20

- Board.Array length bug, #310
- Contributor: Alfonso de la Osa

Signed-off-by: Rick Waldron <dd8fdbe95c7f81f312b273ef8860922803e9ef16@gmail.com>

cumbreras/rv,kod3r/johnny-five,kod3r/johnny-five,AnnaGerber/johnny-five,joelunmsm2003/arduino