Imgencry text-to-image obfuscation

Imgencry is now modular, allowing multiple "PathControllers" and "Colorizers".

PathControllers change how iteration along the image is controlled,
   different pathcontrollers currently implemented are Hilbert (default) and Linear (shown above) path controllers

Colorizers control which colors result from what text.
   There is only one so far and I dont plan on making any others.