Feature/large-texture

[csakip]

• When a larger texture is being loaded than the TexPacker was initialized with, it creates a canvas sized to it, stores the texture, then restores the last texture that was being populated.
• Added largeTexture example

[csakip]

Please note that npm run lint gave every line end character as error for all the files, so I couldn't run linting.

[slmjkdbtl]

I actually had an implementation for large textures locally but haven't pushed yet, I just pushed my implementation but added your example here, thank you!