Merge history from osmo-gsm-manuals.git

Change-Id: I298828d47ce86c13301f5ab245934fbcf8d8d2d3
tree: 6b18ae2aae701a24ea3ef802e2866ab4fae1a14e
  1. contrib/
  2. debian/
  3. doc/
  4. openbsc/
  5. .gitignore
  6. .gitreview
  7. .mailmap