Making reset work w/ name instead of file path
Adding command to list levels
Display level name in description
Adding command to load level from file
Updating README.md

Updating Testing Levels in README.md
Merge remote-tracking branch 'mattvleming/master'
Feature: Allow reset to take a level name

Reset can now take a level name as well as a path or no arguments.
A new `levels` command has been added to list all of the levels.