provide Deploy section to tachyon docs. Add AWS/OpenStack/Docker/VirtualBox deployment docs

Signed-off-by: rootfs <hchen@redhat.com>
review feedback

Signed-off-by: rootfs <hchen@redhat.com>
Small fix in Performance - typo
Merge pull request #538 from shimingfei/PerformanceFix

Small fix in Performance - typo
Merge pull request #536 from rootfs/cluster-doc

Provide Deploy docs