Add to and modify the Bash startup scripts

In .bash_profile:
* Change the GOPATH to user's home directory, and add explicit quoting
and parameter expansion syntax.
* Set an environment variable to prevent bash from saving consecutive
duplicate lines in history.

In .bashrc:
* Set the primary prompt string parameter
* set some shell options
    * immediate notice of done background jobs
    * for clobbering explicitly: '>|'
    * vi-style line editing
* Add a possibly useful alias 'debug'
Change bash and vim configurations

Add some bash aliases and functions, similar with vimrc.
Restructure

Change project orientation from home to root directory.
Add various

Add various configurations for /etc, add xinitrc, add notes directory in
which there are notes and misc.