CLOUD-926

Remove items under Marketplace in sidebar menu
Remove items under Partners in sidebar menu
On only top navigation: make "IBM Cloud" link back to overview (home) page
Desktop bug with footer link to phone number
Footer design tweaks (nice to have)

Signed-off-by: VIncent OuYoung <vincent.ouyoung@ogilvy.com>
Merge pull request #23 from vouyoung/master

CLOUD-926