Plan toolbar: Layout fixes to keep things from moving around

Plan: Support battery calculations

Pile of bugs fixes around map positioning

Plus low battery announce changes

Major cleanup to Guided Bar: visuals, states, bugs

Survey: Hover and Capture support

Plan: Support for images in turnaround on/off

Fix gimbal visuals

Fix follow vehicle recenter logic

Add resume mission support

Allow custom plugin to provide its own position source.

Moving Add New Set as a sibling of Map rather than a child.

Fixed android package hierarchy to match package name.

Renamed main activity class with a more appropriate name.

Setup-Safety: sizing and positining for all font and screen size possibilities

Camera setup sizing/position combo sizes

Various fixes/changes to initial map positions in Fly/Plan

Also made combo box widths larger to accommodate text

Improve deadband

Tweaks with the offline maps slider.

QGCPalette work

QGCOptions changes

* 'master' of https://github.com/mavlink/qgroundcontrol:
  Missed one
  Switch OS X to 5.7
  Change Plan sync model yet again

Switch OS X to 5.7