Merge pull request #2 from crumblingstatue/master

phoboz/sprite: Use SDL_DisplayFormat() when loading image
Added animation timing due to optimized SDL drawing in previous pull request.
Fine tuning collision against map and jumping
1. Fixed stuck on edge of block BUG
2. Increased size of salamander
Removed intermediate class Player, since BUG fix for stuck on edge of block
required collision and movement to be integrated in one function.
Update screenshot
1. Increased size of mouseman
2. Added below zero check for map
Increased size of human
Changed left and right for human