Update CHANGES
Fix message
Improve the documentation for `opam init` and `opam config setup`
Fix initialisation of ~/.profile
Shorten some message displayed to the user
The new repositories should always have the highest priority

Fix #506
Changed default OPAMCRITERIA to a more sensible one for opam
Better error message when trying to upgrade a non-existing repository / a non-pinned package.

Fix #507

Also improve the behavior of update of pinned packages: in this case it is neither necessary to run a full repository update and to rebuild the global cache so don't do it.
Merge branch 'master' of github.com:OCamlPro/opam
Update CHANGES
Better error message when a directory cannot be removed.

Fix #508
Be more robust when loading the cache file.

This should avoid embarassing segfaults when the file is corrupted.

This probably fixes #505
Run the tests with changing the global config.
Use List.rev_map instead of List.map when needed.
Simplify README

Add a small paragraph explaining how to upgrade (basically you don't have to do anything).

Fix #504
Fix typos in README
More README tweaks
More README tweaks

(shameless inspiration from the very good https://github.com/twitter/bootstrap/blob/master/README.md)
try to add a linebreak in the README
A less egocentric presentation in the README