Gradle: Create a gradle plugin that can pack textures automatically into an atlas based on configurations

[LeHaine]

Should be able to automatically pack images of a specified directory into a JSON based atlas file and placed into resources on compile or triggered via task.

https://en.wikipedia.org/wiki/Bin_packing_problem

Suggested features:

• Uses a MaxRects packing algorithm
• Rotate images 90 degrees for efficient packing
• De-duplication of images that are the same
• Add padding between each image
• Adds borders to each image to prevent bleeding
• Output as the default JSON types
• Able to specify input and output directories
• Specify the maximum width and height of each page / texture that is outputted