added a booststrap script to checkout a bunch of repos
improved mercurial setup
added setup of python-update-alternatives

--HG--
rename : config/fish/virtualenv.fish => config/fish/lib/virtualenv.fish
added a better copy function that uses rsync
Added tag 1.2.0 for changeset 87a79d105456
Merge
Removed tag 1.2.0
Added tag 1.2.0 for changeset 7e56c995e483
Added tag 1.1.0 for changeset a34d1d50791e
Added tag 1.0.0 for changeset 814a50985eaa
Removed tag 1.1
Removed tag 1.0