Version 1

The API works fully, images are converted to ASCII text correctly in multiple character sets and with size options, the example main.py shows off the demo pretty well.
Future features:
JSON output

First working release

Updates:
No user preprocessing required, aspect ratio of output fixed, API began.
Features:
API is not very useful; selects a random character if "darkness value" is already calculated.
Demo program (main.py) generates ASCII art straight from an image, allows selection of size and character set.
Upcoming:
Useful API (can take an image and output a 2-D list)
GIF support (3-D list)
JSON output? (In addition to list/.txt file output)

v0.3-b

Updates:
User doesn't have to grayscale the image beforehand; options for the character set of output provided.
Continued features:
Converts JPEG or PNG to ASCII art.
Upcoming:
API
Fix aspect ratio of the output
Remove the need for user pre-processing (re-size)

Quick hotfix

Fixes a couple issues.
Strengths:
Generates ASCII art
Weaknesses:
Art is distorted; user must preprocess images.

Support JPEG

This release makes it unnecessary for transparency to be applied before inputting the image, and adds support for JPEG.
Features:
Converts JPEG or PNG to ASCII art.
Upcoming:
API
Fix aspect ratio of the output
Remove need for user pre-processing
Options for character set of output

First draft

First draft of the project, useable but not useful.
Strengths:
Generates ASCII art
Weaknesses:
Art is distorted; user must preprocess images.