fixing some trees

A couple of trees have a footprint that is too big. It looks like you should be able to drive by them, but you can't. They have been set overly-large.
fixing tree cluster

This tree cluster looks like it should be passable through in this cell. Looks fine in testing, even though looked like it might be wrong in map editor.
closes #3091 Have Helis take off after repair/rearm
Merge pull request #5258 from psydev/patch-4

fixing some trees
Merge pull request #5250 from JordanGlue/bleed

Have Helis take off after repair/rearm
Update Command.cs

WRange is actually a 1D world distance with 1024 units = 1 cell.
Fixing Helis taking off after rearmed but before repaired
Merge pull request #5259 from JordanGlue/bleed

Fixing Helis taking off after rearmed but before repaired
port Tao.OpenAl to OpenTK.Audio.OpenAL
StyleCop
port Tao.OpenGl to OpenTK.Graphics.OpenGL and avoid Arb

closes #4540
only query for the extension we need
give a hint when someone forgot to install drivers on Windows
check for OpenGL version 2.0+