Implement camera movement

[jonpas]

• Close Implement camera movement #57
• Implement camera movement while holding down Right Mouse Button and moving the mouse (X and Y axes)
  • Limited by board edges
  • Reverse values to simulate or give illusion of moving the map around (as in you hold to the map and move it around)
• Implement camera zooming using Mouse Wheel Up & Down
  • Limited to minimum of 100.0 and maximum of 500.0 (easily tweakable in C++ Constructor or Blueprint)
• Add AETVCameraDirector (and inherited Blueprint BP_CameraDirector which is set as Default Pawn Class)
  • Pawn (controllable Actor) which gets moved around
  • Scene component (invisible) with a Spring Arm and Camera (additionally Static Mesh if debug enabled to visualize current Camera Director position in world)
  • Control input, easily extendable with more ways of controlling
    • Enable Movement (hold Right Mouse Button)
    • Move (Mouse X and Y axes)
    • Zoom (Mouse Wheel Up and Down)
    • Uses bound actions (ability to allow the user to change them if ever wanted in the future)
  • Move Above Tile method for moving camera to a tile on (X, Y) coordinates of the Tile Map
    • Ability to specify zoom percentage (default retain current zoom)
    • Requested by @Nevith for moving to ships upon clicking them in Ship list
• Change Tile Map Z location to 0.0 and Ship Actors to 0.1 (streamlining, closer to center the better)
• Fix GetWorld() being nullptr and causing a crash in Action class
  • UObjects don't have a path to GetWorld() always set, override with valid path set using owner of the action (Ship) as Actors always have a valid path to world
• Opens Ship Actors make camera jump around if at similar height #68, but currently worked around by having Camera Director 20 UU (Unreal Units / centimeters) higher
• Adjusts targeting for new Tile Map location and dynamic distance from it due to Camera Director zoom