Alias percona::default to percona::client like in mysql cookbook.
Adds mysql dep. Moves client packages and libmysqlclient-dev into attributes.
Copies mysql::percona_repo into this cookbook.
Creates separate client/server test suites.
Fixes apt_pref resource for glob attr in v1.9.0.
Adds chef-rewind for forcing pkg install from non-distro percona repo.
README updates.