Merge pull request #654 from dbuenzli/master

Tell users to `remove` instead of `uninstall`.
Fix some spelling errors

Patch from Mehdi Dogguy <mehdi@debian.org>
Update CHANGES
Merge branch 'master' of github.com:OCamlPro/opam
support fish shell in client configure command

these changes add support for the fish shell in the client configure
command. the main additions are a printer for exporting enviroment
variables (opamConfigcommand:print_fish_env) and a modification to the
dot file finder heuristic (opamMisc:guess_dot_profile).
Merge pull request #655 from 94c3/fish_shell_support

support fish shell in client configure command
Fix installation of package with no archives (such as ocp-build beta6).

This should fix https://github.com/OCamlPro/opam-repository/issues/761

This regression has been introduced by the recent merge of the 'quick-update' branch.
Inverse the depext tag selection.

Fix #647
Update CHANGES
Fix #651

OPAM now tries to fix dandling symlink for OPAM files on 'opam update', and for compiler files on each opam invocation (that's a bit too much maybe, but well ...)
Fix embarassing #648

This is a regression introduced by the 'quicker update' branch merge.
Remove spamm on 'opam init' introduced by last commit

Fix #663
Fix handling of version files for HTTP backends
Improve the message when updating the backends

This should help fixing #620 (and maybe #661 ?)
Be more verbose on 'opam update'

This should fix #661
Fix typos in 'opam init'
Remove spams in debug logs
Improve 'opam init' by only downloading urls.txt and index.tar.gz once.

For an unknown reason, this was done (at least) once, thus slowing the
whole process. Luckily, because of the "nice" 'opam update'
refactoring (which has introduced too many regressions), it is now
trivial to build the global state when the repositories have already
been udpated and so 'opam init' is much nicer now!
Change the default behavior of 'opam list' to use the same conventions as ocamlfind (ie. to display only the installed packages).

Use 'opam list -a' to list all the packages which are installable.

I'm not totally convinced by this change (actually I don't really care), but let see if people start screaming or not.

Fix #644
Actually, really change the behavior of 'opam install' (#644)