Create cells that can obtain their row, column and box

* Created an html skeleton to load in the javascript file
* Created a Cell object that takes a value and an index position.
* From this position, the cell can determine:
  * its row,
  * its column,
  * its box (1 - 9, where boxes are counted left to right, top to
    bottom)
* The cell will need to run setRowColBox() in order to assign all
  of the values.

Next steps:
* Testing! I shouldn't have done all of this without tests, so the
  next step is to get jasmine configured and testing that cells
  are made and correctly calculate their rows, columns, and boxes.
Create Jasmine tests to cover cell's functionality

* Imported the most recent version of Jasmine
* Created tests for cell creation, cell starting values,
  and cell functions that assign rows, columns and boxes based
  on cell position.
Merge pull request #2 from mknudsen01/make-cell

Make cell