Hotkey support to select all units across the entire map

Selects all Units of the type of Units you have selected with "K"
Merge remote-tracking branch 'origin/pr/4'
Added Teams!

Still a basic version of teams.
From now on only buildings and characters that belong to the player can
be selected (resources are considered neutral and available for
everyone).
Added a bool on BP_RTS_Character that allows editor-placed characters to
look for a player owned team. Maybe this is also needed for buildings?
Improved building placement

It should no longer be possible to place buildings on top of resources
Updated with Poll links
New map: Estermoor
Estermoor slight update
Added Estermoor Assets
Estermoor: Added Nav Mesh
Estermoor: Updated Light
* Experimental construction manager + Associated controller and game mode