another attempt at proper retina texture scaling
retina scaling fixed, thanks @aroth for testing
camera fix to center levels smaller than screen
game now handles images loaded after preloading phase, resize/refresh bug fix
bug fixes for recent changes
incorrect tile shape extraction bug fix (thanks @aroth for finding)
first pass on fix for #113
transitioner fade out fix
background map merge fix for #114
example typo noted in #112
initial fix for #115
more fixes for preloading noted in #112
more bug fixes for #112
code beautified
example code beautified
fix for #125 found by @Pattentrick
Correctly start new mergers for backgroundmap merging
Merge pull request #127 from flurin/fix-126

Correctly start new mergers for backgroundmap merging
disabled casting shadows on pixel perfect lights in combination with castsShadowsMovable
Merge pull request #130 from Pattentrick/pixel-perfect-fix

disabled casting shadows on pixel perfect lights in combination with cas...