Horizon Browser Support should be merged into devref

[Rob Cresswell]

https://wiki.openstack.org/wiki/Horizon/BrowserSupport is outdated and should be merged into devref

In addition, the information is currently outdated and incomplete, so it should be updated to include more recent information.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/380672

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/380672
Committed: https://git.openstack.org/cgit/openstack/horizon/commit/?id=e43fb80b26895e8a4df15a25312a8456a1a74a84
Submitter: Jenkins
Branch: master

commit e43fb80b26895e8a4df15a25312a8456a1a74a84
Author: Laurent Baeriswyl <email address hidden>
Date: Fri Sep 30 16:21:29 2016 -0700

    Move browser support wiki page into the docs

    The browser support page should be part of the docs. This change
    moves the content of the wiki page into its own file that is accessible
    from the index. References to the wiki page have consequently been
    removed from the FAQ.

    Change-Id: I340203771cb2b0dfa534ad3f8926e599a727e1e9
    Partial-Bug: #1625514