CMS: new VM image (1.0.0-rc6)

* Updates CMS VM image from 1.0.0-rc4 to 1.0.0-rc6.
  (closes #562)

Signed-off-by: Tibor Simko <tibor.simko@cern.ch>
UI: various updates and fixes

* change the CMS intro text (closes #561)
* moves virtual machines above getting started(closes #560)
* updates text for exp-descriptions in fixtures ( addresses #361)
* adds ability to exclude exp from breadcrumbs