Documentation added.

Okay. Took a small break from MathTools to work on another project. Back now with new stuff! Specifically, documentation added to wiki pages. Trying to unify the two MathTools wikis.
Posted wiki docs on how to install (easy) and run (also pretty simple) MathTools. Added a page to address possibly-scary javadoc issues: shadow methods/SCROBs and basic info on when such things as file load/pick dialogs will or won't be available.
More coming soon.