Adds button copy.
Adds copy to context menu.
Removes copy from locale site menu.
Makes implementation easier.
Removing one else if.
Removes redundant code.
Minor changes.
Some improvements.
Adding deleteItems function.
Adding header.
FIxes bug in the html test.
Merge pull request #38 from doleiynyk/2013-01-23_Copy_items_via_the_context_menu

Adds ability to copy items via the context menu in the admin interface
Moves delete Item to Abstract.
add bundle handling to xml generation of delivery service provider
add bundle handling to xml generation of delivery service provider
Coding style fix.
Merge pull request #175 from doleiynyk/2013-05-08_implement_deleteItems

Implements delete items for all managers
Extending _deleteItems.
Merge https://github.com/Arcavias/arcavias-core into 2013-05-14_bundles_fix
Merge pull request #178 from doleiynyk/2013-05-08_implement_deleteItems

Extends the _deleteItems() method by an optional parameter for checking the site ID