Small bug fixes update

Hi all, This fixes a few issues that were reported recently: [olist] [*] This fixes a bug with switching environments (if an environment was clicked multiple times before loading has finished everything would stay black) [*] This fixes the tracking for cycle crunches when in the new lake environment. [*] An exit button has been added to the login panel so you don't have to use a system menu to exit RealFit [/olist] Thanks for the feedback! - Robert