(Bash) Add cd() function, correct aliases of cd

1. Using cd() function, Example:
  - `cd ...` as `cd ../..`
  - `cd ....` as `cd ../../..`
  - `cd .....` as `cd ../../../..`
(Tmux) Update tmuxline_nightly_fox.conf, remove powerline symbol
(Bash) Update bash-compeltino.sh
(Vim) Add vimrc into submodule
Install vim