base: JSON data model fix for external URLs

* Fixes JSON data model for external URLs (`8564`).

Signed-off-by: Tibor Simko <tibor.simko@cern.ch>
UI: "disclaimer" text changed

* (closes #139)
CMS: author/experiment field update in Tools

* Fixes author fields and accelerator/experiment field in
  `cms-tools-ispy.xml`.  (closes #142) (addresses #145) (PR #217)

Reviewed-by: Tibor Simko <tibor.simko@cern.ch>
CMS: fix typos in MARCXML data files

* Fixes typos in CMS data files.  (closes #195) (PR #195)

Reviewed-by: Tibor Simko <tibor.simko@cern.ch>