Optimisations Part 4: New Sprite Loading System for 10 and 15 min exercises — Boot Camp Fitness Steam update #324451

* Improved sprite loading system added to all 10 min and 15 min exercise algorithms at all levels. Before, the corner exercise was destroyed (as an object instance) and then recreated (as a separate object instance) when it moved to being the main exercise. Now it is not destroyed, but instead re-sized to be the main exercise. In a nutshell, only one sprite texture file is being loaded instead of two on each exercise change. Which I hope will cut texture sheet loading by 50% and maybe get rid of the blue bar lag glitch that some players are experiencing. If anyone who has experienced the blue bar lag glitch wants to test this that would be great. Just launch any 10 min or 15 min exercise and notice the sprite loading performance, then launch any of the 20, 30, 40 or 60 minute exercises which are still on the old sprite loading system and see if it makes a difference. If it does, please l...