Structural update of Control Explorer based on my experience
Remove the blocker div on start of navigation
Fixed set_pxe_image_type

* When running multiple tests, the image may already have been set in
  which case the buttons failed to become active.
Merge pull request #932 from mfalesni/control_structure_update

Structural update of some Control Explorer objects
Workaround for vSphere4 refusing to power off suspended machine
Merge pull request #933 from mfalesni/bad_vsphere4

Workaround for vSphere4 refusing to power off suspended machine
Merge pull request #934 from mfalesni/blocker

Remove the blocker div on start of navigation
Merge pull request #935 from psav/set_pxe_image_fix

Fixed set_pxe_image_type
Added snapshot code
Merge branch 'snapshot-new' of https://github.com/akarol/cfme_tests into snapshot-new
updated snapshot exists code