Move buildAck method into message-builder.js
Added test for configureUpdateInterval and supporting testDownMessage function
Added function to message-builder to build message
added test for requestLocation
Added test for requestLocation
Added test for configureSpeedAlert
Added tests for switches
Added test for device restart
remove logging
Added test for configureUpdateIntervalWhenAccOpen
added test for configureUpdateIntervalWhenAccClosed
Return downMessageReceivedByTracker as a string not a buffer
Added test for geo fence
Make sendCommand wait for response from tracker