Feat/sprites

[marijnvdwerf]

This needs work.

• Need to decide where to "start" (currently it reads the last 0x40 bytes for the header, and the start offsets are the first image - 8 to account for the aligner
• Needs to generate labels
• Needs to figure out the datatype used for alignment (seems to vary between sprites?)
• Needs mkprite, mkisprite, and mksprite32 ported
• 0xA9D3E0 seems to have been modified post-conversion. We need an option in the yaml to 'dump as 320', and an option for mksprite to 'override width'. Or do it some other way.

Counts per type

   3 ci8
   1 i8
   3 ia16
 261 rgba16
   6 rgba32

@Unnunu's tools:

• mksprite.py
• sprite.py

[Ryan-Myers]

Can you add numpy to the requirements.txt for this? I tried building it locally, and had an issue with that dependency being missing.