Added constants for loader asset types: image, audio, json, binary
Created separate functions for loading each type
Added JSON and Binary loaders
Refactored Spineable so it asumes that all image, json and binary assets are already loaded
Updated the spine example, so it uses the Loader to load all assets
Removed source property for image assets from all examples (not needed anymore)
Added Sugar function to clear a canvas context while preserving the transformation
Merge pull request #136 from spilgames/88-json-binary-loader

88 json binary loader