Increase the number of people working in Unity 3D editor on Linux.

Is the Linux editor still actively being worked on?: http://forum.unity3d.com/threads/is-the-linux-editor-still-actively-being-worked-on.411948/#post-2696166

Linux status and builds: http://forum.unity3d.com/threads/unity-on-linux-release-notes-and-known-issues.350256/