* casestudies/*: moved into top directory, renamed them to group them
  visually.
* case_OaklandUniversity.pdf: updated.
* case_howard_county_library.pdf, case_oxford_archaeology.pdf: added.
* logo-*, debian/install, debian/rules:
  - moved logo-* to logos/,
  - removed Edubuntu logo for now, needs updating.
* oo-cd-cover.odg: removed.