Gdx-Setup-UI: Switched to OpenGL ES 2
Gl20
Merge pull request #1427 from Tom-Ski/master

Update gdx-setup to Gl20
Merge pull request #1425 from Unkn0wn0ne/master

Gdx-Setup-UI: Switched to OpenGL ES 2
Merge remote-tracking branch 'upstream/master'

* upstream/master:
  Gl20
  Gdx-Setup-UI: Switched to OpenGL ES 2