UI: links and routes added to homepage

* prepares the “about” links and pages for content to be added (closes
#65)
* prepares pages for all links in “entry points” (addresses #66)
UI: FIX for tab functionality in collection_list

* FIX for default activated tab on pageload
URL:  `/educate/` -> `/education/`

* name change for the “education” routing (closes #97)