Merge pull request #80 from doublelift/master

starting point for angular refactor
Add utility file for grid file format converter
Removed Console Log  from FormulaJSComp
Revise file structure for README
Restyle bottom tabs
Added Angular Support for the spreadsheet
Merge pull request #83 from fsbatista/angular

Angular Support added for Spreadsheet (Nick Solo Stuff)
add git module and factory
move controller into shell.html and add  openRepository()