Feature #896 add json response for statistics page

a few test fixtures had to be changed, in order to ensure that
statistics are returned correctly.

Signed-off-by: Corey Osman <corey@logicminds.biz>
Signed-off-by: Ohad Levy <ohadlevy@gmail.com>

Fixes #805 - display 'no subnets' when selecting a site with no subnets

Signed-off-by: Paul Kelly <paul.ian.kelly@googlemail.com>

fixed colors and order of serias in show host page resources chart refs

fixes #885 - unable to fetch tftp serever name correctly

refs #285 - removes any left over from the old google charts libraries

fixes #285 - Use Charting system which can work offline

• dashboard charts
• statistics page
• host show page

additionally, main menu buttons and bookmarks drop down are easier to handle and read

fixes #872 - LDAP Auth Source Account Password reset

fixes #673 - Curl can't be used to trigger runs

fixes #876 - Improve puppet certificates pages

• Add basic things like filtering based on state (pending, valid, revoked) sorting etc
• Add support timestamps that were introduced in #873

fixes #874 - rails js caching fails to refresh