REDCORE-170 #comment add a standard copy button to redCORE toolbar

This pull request adds a new "Copy" button to list the redCORE the standard toolbar. And thus complements existing: edit, csv, publish, unpublish, ...

![screen shot 2014-03-27 at 10 05 50](https://cloud.githubusercontent.com/assets/1375475/2535488/27b44596-b58f-11e3-91be-f16abcb5ad8d.png)

Example of using the "copy" button:

![screen shot 2014-03-27 at 10 11 02](https://cloud.githubusercontent.com/assets/1375475/2535527/c5f74334-b58f-11e3-80fe-5789c4cc3891.png)

This pull closes #181