creates cubes with attributes read from mario JSON
  * TODO: move mario JSON to external file
    * this will require us to create a server (likely using node.js)
Create cubes from marioJSON.
  * Remove unneccessary positionSelf function.
  * createCube now takes position argument.
Make Mario's shoes from mario JSON.
Merge pull request #6 from jonathanpeterwu/place-cubes

Place cubes