Reorder of headers

I removed some needed headers from a top level file which then causes a
ripple effect downstream

Fixing QmlObjectListModel usage bug

Download Speed Tweaks (+2 squashed commits)
Squashed commits:
[ff0ef7e] Cleanup (remove OpenStreetMap)
[370fa1d] Done (+25 squashed commits)
Squashed commits:
[9f3368f] Need to check how many instances of MapEngine are active.
[d557eac] Download Optimization
[392f50a] Almost there.
Trying to optimize download.
[a49d1d2] Settings
[a94be97] Mostly there. Needs to finish options and map thumbnail.
[38d5a0b] Downloading tiles and deleting sets
[81101b9] More UI Work
[c597d4b] Downloading tiles
[a815e35] Get rid of OpenMaps
[7e177ea] More reorg
[fa6b671] Start handling create tile set
Fix signal order when creating fetch tile task
[2a31f4d] Refactoring
[268b906] Renaming things
[947d66e] Fix resource load error.
[19e2de8] Adding MapBox
[c73e627] Preparing download
[87bbf22] UI Tweaks
[3c32a86] A lot of UI code done.
[ece8ce2] Starting to deal with tiles
[7f387bc] Save tile set
[f66f343] Adding more code
[4de3418] Working
[f0cc25d] Done for the night.
[2d1d86e] Added SQL database for holding out own tile cache.
[d405a87] Convert to camel case as this has been driving me nuts.

The overloaded member signal just hit us, to use it is a pain
but the resuting code is faster and less error prone, so it's
still a good thing to do.

Signed-off-by: Tomaz Canabrava <tomaz.canabrava@intel.com>

Map cacheing for < 5.5.0 was broken and we were using whatever default was provided by QtLocation. Now we're properly creating and configuring a cache manager.

Updated Google Maps API Version
Updated User Agent used for map tile requests

The problem only shows up on Windows and only if you have built your own
version of Qt. Must be something slightly different with the includes in
that case.

It was introduced by the Open Pilot URL Factory code.

Restructured to better fit existing build structure