Cleanup generated doc on 'make clean'
Extending interface of opam-admin.top

It's sometimes useful to get access to all its files when rewriting inside a package
Cleanup a bunch of obsolete files, move admin-scripts apart
Add a script to automatically add dev-repos to the repo

only for github packages, but it's already a (very good) start, and should be
easy to adapt for others
Merge pull request #1454 from OCamlPro/files-cleanup

Cleaned up old files, put admin-scripts apart