simplify implementation of YellowOnBoardActuators

This new version uses substantially less code to do nearly the same
thing. Data hub inputs are no longer created because they were not used
and I believe that clients should be observing the things that control
the LEDs rather than the LEDs themselves.

- all colors initially off
- writing 0/1 to any color turns it off/on
- reading the sysfs file gives a value consistent with what was written
  previously

Remove the mcp9700aTemperatureSensor app because it was decided that
this device would not be integrated into the mangOH Yellow.

Fix bug in CombainHttp sending 2 responses for 1 request, add check for waitingForCombainResults all places(race?), don't ifdown wlan1 until Cypress gets back to us

Also remove DataPushTest app since it's not useful.

The HTTP thread is now started unconditionally rather than trying to
start it only when required.  Also fixed some formatting issues.

Add Combain service available call (only if api key is set), as soon as scan is done stop wifi client and cleanup some duplicated code

Change GPS/Wifi algorithm, add locationServices to sdef, fix bug in not killing location request, streamline processing

More newlines

Added newline spacing

Add /etc/network/interfaces update for ifup scripts.

combainApiKey modifiable via dhub dynamically, set dhub json string format same for gnss & wifi, i.e.zero for alt & vacc, finally auto-start location