Bug 14608 - HEA : add possibility of sharing usage statistics [squashed]

Bug 14608 - HEA : add possibility of sharing usage statistics [squashed]

This patch set adds:
- a reference to Hea at the end of the installation process
- a link to the new page from the admin home page
- a new page to easily configure shared statistics

Signed-off-by: Mark Tompsett <mtompset@hotmail.com>
Signed-off-by: Chris Cormack <chrisc@catalyst.net.nz>
Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Brendan A Gallagher <brendan@bywatersolutions.com>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Mason James <mtj@kohaaloha.com>