inital menu manager commit
All UI scene loading is now filtered through the menumanager
Load screen set up
Load screen only shows up when loading new levels
hacked pause removed and min-load-time added
Load screen comes up when reloading the same level, because it turns out it takes some time on the iPad
removed accidental code
mission menu now tests button types before incremeneting level to load
Converted MIN_LOAD_TIME to a game const
Merge pull request #99 from VajraFramework/ui_manager

Ui manager