Update 1.4.9_EarlyAccess - Thermals

-Add Challenge 3 Thermals.
-Add AI Eagles that circle in thermals.
-Update flight physics so you can do a sharp spiral left and then right without glitching the wing.
-Fix issue where thermals would stop populating if you travel too far.
-Adjust the way thermals populate.
-Update clouds 3D models and the way they populate.
-clouds grow and shrink slower.
-Fixed some UI issues when using a gamepad controller.