CRC library issue

[mikejohanson]

Just a note, it seems that the CRC library made some changes since this library was last updated. In order for me to request and receive messages from Bean (temp, accel, etc...) I had to update line 74 to this: var crcString = crc.crc16ccitt(this.gst.slice(0,this.gst.length-2)).toString(16) and line 126 to this: var crcString = crc.crc16ccitt(gstBuffer).toString(16) in order for everything work correctly.