Add read-pass alias for passwords

Signed-off-by: Nicolas Iooss <nicolas.iooss_git@polytechnique.org>
Move shell configuration in .shell folder

Signed-off-by: Nicolas Iooss <nicolas.iooss_git@polytechnique.org>
Add dxrandr, a script to ease XRandR configuration

Signed-off-by: Nicolas Iooss <nicolas.iooss_git@polytechnique.org>