bashrc: add json pretty print alias.

Signed-off-by: Emmanuel Roullit <emmanuel.roullit@gmail.com>
bashrc: Reconnect or start a tmux or screen session over ssh.

Signed-off-by: Emmanuel Roullit <emmanuel.roullit@gmail.com>
bashrc: add alias to create a dir and cd into it.

Signed-off-by: Emmanuel Roullit <emmanuel.roullit@gmail.com>