Introduction page for algorithms

[voronoipotato]

It'd be nice to have a .md for each of the algorithms that gives a brief (like one line) introduction to the kind of problems it solves, and the best and worst case. Of course one can simply hit up wikipedia, but if we're hoping to maximize accessibility, many developers might not realize they're reinventing the wheel. By having a quick note card style reference, it affords for a need-basis learning style.

[kennyledet]

Yes, this is something that has been in my mind since the beginning, and will need to end up happening anyways for the purposes of display on the upcoming website programmatically.