* Added test that demonstrates above functionality, by starting Application without attaching the canvas, and then constantly attaching and detaching canvas from a frame. * Deleted deprecated methods in JmeContext * Deleted deprecated class LwjglJoyInput * Audio renderer will not attempt to initialize OpenAL twice if already initialized git-svn-id: https://jmonkeyengine.googlecode.com/svn/trunk@7078 75d07b2b-3a1a-0410-a2c5-0572b91ccdca