add img directory to assets
move /css to /assets
move /fonts to /assets
update gulpfile for new css path
update script paths for new css dir
rename /js to /app
update filepaths for new directory structure
Merge pull request #75 from doublelift/master

organize file structure
hacked handsontable cell renderer
Merge pull request #76 from NickStefan/master

hacked handsontable cell renderer
Mid way through toggle sidebar
Removed toggle button for now
Solved Merge Conflicts
Added FormulaJs Compatibility check