Cleaned up unneeded qDebug() messages.
Improved qDebug() message to point to widget as well as class.
Removed connections with no slots.
INS: use an accessor method on the state

Publically exposing the Nav structure was bad design.
INS: Remove old 16 state version

Not used and previous change broke it.  It will be in history
if needed.
INS: get rid of unused Nav structure
INS: make functions that should be static

This code is quite old and was committed before our standards were
so high.
GCS Controller: add periodic timer to send GCSReceiver

This is a quick solution to problem 508 where the GCS Controller does
not successfully set GCSReceiver frequently enough to remove a failsafe.
When using GCSReceiver mode when you move the stick to a valid position
it will stay connected.
GCS Controller: only transmit updates when enabled

When the GCS Control checkbox is enabled then GCSReceiver outputs
will start occuring periodically.  With this patch control works
but still ManualControlCommand is set to read only which blocks
it.

Work on #508.
GCS Control: move changing ManualControlCommand meta to the gadget

The original architecture is first of all problematic.  Way too much
logic is in the widget (UI) instead of the gadget (controller).  This
was a problem for enabling GCSReceiver control since it was clobbering
ManualControlCommand meta to read only which blocked the FC from reading
the "Connected" flag.

Fixes #508
Added unit test install command to Makefile help.
Fix Q_DECL_EXPORT bug that caused Windows breakage.
Merge pull request #543 from kubark42/fix-telemetry-scheduler

Fix Q_DECL_EXPORT bug that caused Windows breakage.
Merge pull request #533 from peabody124/hitl_fix

GCS Controller / HITL fix
Merge pull request #531 from peabody124/ins_get_state

INS cleanups
Merge pull request #538 from kubark42/makefile-unit-test-innstructions

Added unit test install command to Makefile help.
Merge pull request #525 from kubark42/qdebug-message-fixes

Quiet qDebug() startup messages
quanton: add adc support on receiver port
quanton makefile: added pios_adc.c
quanton: refactored adc support