Story #3075 : import a basic agile dashboard template

We are now able to export trough the CLI an XML containing :
Trackers / cardwalls on top and agildashboard's plannings

Still with the CLI, we are able to import this XML into a new project and retrieve all these configurations

Change-Id: I1b1b3f965a6375c857e8feceeebfb21e2554f163
Merge commit 'refs/changes/95/395/3' of http://gerrit.tuleap.net/tuleap into tuleap-stable-master

* http://gerrit.tuleap.net/tuleap:
  Story #3075 : import a basic agile dashboard template

Conflicts:
	plugins/agiledashboard/include/AgileDashboardRouter.class.php
	plugins/agiledashboard/include/autoload.php
	plugins/cardwall/include/autoload.php
	plugins/tracker/include/autoload.php
Tuleap 5.12.99.43