Began refactoring eqn_viz to use SolnManager
Moved existing functionality into AnswerSetManager
Moving more parsing functions to AnswerSetParser
Began transition to use AnswerSetManager
Adding GeneratedEquation class to make JSON storage more compact
Changed AnswerSetParser to save GeneratedProblem instance
instead of MathProblemParser instance
Began implementation of JSON encoding
Added ability to dump to json file
Working json initialization
Refactored saving to file, making it easier to use