React Datasheet Versions Save

• Bugfix: https://github.com/nadbm/react-datasheet/pull/177
• Remove componentWillReceiveProps warnings

• Handle shift modifier to add/subtract selected cells.
• Add condition to use onClick instead of onDoubleClick for mobile devices
• Add copy/paste for IE

Many thanks to @patrick-jones

Updates

• Refactoring for to support custom renderers
• Drag & drop possible ( see Sheet with custom renderers @ https://nadbm.github.io/react-datasheet/ )