Spawn window in editor
Add radius and count parameters. Add spawn window layout
Merge branch 'master' of https://github.com/szamq/Urho3D
Code format, deleted commented code, tabs to spaces
Merge branch 'master' of https://github.com/urho3d/Urho3D
Use spawnRadius parameter in world space.
For Travis CI - switch CI build to use OS X build environment.