Merge pull request #133 from fsbatista/angular

Issue Solved - Initial commit appears after first Import
Remove legacy js files in app/
Call renderSheet from shell.js only and attach current workbook instance to currentWorkbook factory, resolves #131
Merge pull request #134 from johnheroy/master

Cleanup and attach current Workbook instance to currentWorkbook factory, resolves #131
added unit test browser specrunner for workbook
Merge pull request #135 from NickStefan/master

added unit test browser specrunner for workbook
Try gridifying before taking snapshot
Merge pull request #136 from johnheroy/take-snapshot-xlsx

Try gridifying before taking snapshot
Working snapshots after importing .xlsx
Merge pull request #137 from johnheroy/take-snapshot-xlsx

Working snapshots after importing .xlsx