Feature/floatable toolbar

* Separate the view ext packages into an external maven project api/orbisgis-view
* Separated ToolBars can be created, using only swing Action class.
* Update DockingFrame version in order to use the ToolBar extension.
* By using the ToolBar workspace, the default serialization file has to be updated.
* Currently only Button can be set in ToolBars, input text control and ComboBox has not been implemented.