Miscellaneous doc fixes -- Part II

contents/contents-pre-install -- moved 4500-hardware to after vcenter
  section per David Easter

contents/contents-user -- moved vcenter before Fuel CLI section -- this
  is correct in the live build but, even after rebasing a couple times,
  was wrong here.

_images -- cropped the following:
- settings-vcenter

virtualbox.rst -- changed title to "Running MOST" rather than "Running Fuel"

release-notes.rst -- changed maxdepth back to 2; David didn't like seeing
all the issues listed out.

release-notes
- 040-resolved-issues -- David does not like grouping all the known
  hardware issues into a single section so I backed out what I had
  started to do -- deleted the header and changed the heading leve
  for the individual issues.
- 050-known-issues
  - removed duplicated "other issue" about ceph mon and ceph osd; it was wrong
    because it talked about the ceph mon role which is not yet supported.

terminology
- Updated Murano article with info from the Release Notes about requiring
  Neutron

user-guide/200-deploy-new-environment
- Hypervisor section now points to vcenter config info
- vcenter config info now references hypervisor section

user-guide/vcenter.rst -- made the instructions point to the
Hypervisor screen and the vCenter configuration screen and
corrected the description of where these are.

Change-Id: I609348e3a301f77a837d36f4178ada2dccd3a3ef