Move the content referring to the LTS information from the 'support' page
into a dedicated page.
Also add LTS specific information about the sponsoring and the benefits.
This page also contains clarification on the release cycle of the LTS.
Signed-off-by: Thomas Perale <thomas.perale@mind.be>
Signed-off-by: Arnout Vandecappelle <arnout@rnout.be>
