Merge pull request #144 from NickStefan/master

cells now only have '=' if actually formula
Merge branch 'master' of https://github.com/decisive-wizard/SheetSync
Merge pull request #151 from NickStefan/master

merged ui branch and quieted console logs
Merge branch 'master' of https://github.com/decisive-wizard/SheetSync
Octicons: cursor pointer and change color on hover, resolves #142
Merge pull request #152 from johnheroy/master

Octicons: cursor pointer and change color on hover, resolves #142
gridhub gif added