Enabled server creation via drag and drop.

Disabled default WebKit drag/drop behavior.

Captured drag/drop behavior on the server div to add/remove a dragHover class.

Added simple dragHover style to main.css stylesheet.

If a callback was passed to UI.server.create, call it.

Iterate over the drag-dropped objects recursively [to execute in series], creating a server for each folder provided.
Allowed drag and drop on files, set the server to point to the directory the dropped file is in
Added support for prepopulated server info in drag'n'dropped folders via .fenix.json files
Merge pull request #32 from xqwzts/drag_drop_new_server

Enabled server creation via drag and drop.