add box2d_sprites demo (zombie demo)
change position of portals demo
regen example page
Merge branch 'hammer' into box2d_sprites_example
frozen/box2d/entities and frozen/box2d/joints were missing from build profile
cleanup box2d sprites example
add gesture demo based on zombies using the hammer.js integration
Merge pull request #112 from iceddev/box2d_sprites_example

Box2d sprites example - closes #79