Modify bashrc: Change the path of z
Modify tmux.conf: Add tmux-powerline
Modify vimrc: Comment the textwidth
Add git-install: Git z and tmux-powerline
Detele z: Delete it since we can git from github

Signed-off-by: xxxhoho <qianlei90@gmail.com>
Modify

Signed-off-by: xxxhoho <qianlei90@gmail.com>