Tmux: Fix a minor mistake in default session
Vim: Add a plugin to automatically add timestamps to log files
Bash: Fix Vim aliases

This fix makes sure that I always use MacVim GUI or non-GUI.
/usr/bin/vim will be out of picture. I am forced to do it because
system default Vim broke down recently. I can no longer rely on it.
Bash: Rearrange export commands a bit.
Bash: Open Git commit message editor in Mac Vim Gui

I got it from MacVim [Github
Wiki](https://github.com/b4winckler/macvim/wiki/FAQ#how-can-i-use-macvim-to-edit-git-commit-messages).
Bash: Open Git commit messages in Mac Vim terminal (non-GUI)

The launch new window animation is jarring.