UI: changes logo back to HTML/CSS
UI: responsiveness on "Homepage"

* (closes #76)
UI: introduces experiment images next to actions
UI: introduces breadcrumbs in pages

* (addresses #316)
UI: testimonials styling
UI: removes background colour from entrypoints
menu: adds "education","research" - rearrange
resources: added external link btn + minor styling
UI: fixes bullets for lists

* (closes #315)
logo: new svg outlined "opendata" logo

* fixes cross-browser problems (closes #310)
UI: fixes link to CC0 and CC0 image

* (closes #139)
collections: fixes filesystem conflict OSX/SLinux

* fixes issue with capital letters in filenames on SLinux systems
resources: Change text and picture resources/vispa

* (closes #327)
collections: updates brief format primary datasets

* updates brief format in “Primary Datasets”: introduces “Release” box
(closes #251)
* removes box for barcode/qr-codes for records
collections: cuts text in small collection boxes

* uses “#$#$#” delimiter to split in 2 phrases
* (closes #265)
add collection xml for csv files of dimuons
rm explicit version from url
rm explict version from url
CMS: fix link to VM image

* Fixes link to CMS VM image that uses semantic versioning
  now (`CMS-OpenData-1.0.0-rc4.ova`).  (closes #331)

Signed-off-by: Tibor Simko <tibor.simko@cern.ch>
templates: rearrangement of "About CMS Data"

* Rearranges "About CMS Data" text.  (closes #313)