Update readme.md. Remove 'open tasks' section since these should all be issues in the tracker. Explain in contributing section that contributors should use forks and then submit merge requests.
Update readme.md. Remove 'open tasks' section since these should all be issues in the tracker. Explain in contributing section that contributors should use forks and then submit merge requests.

ChiefOfGxBxL/Spreadsheet.js,ChiefOfGxBxL/Table.js,ChiefOfGxBxL/Spreadsheet.js,ChiefOfGxBxL/Table.js