Switch to using GNU Stow for installing

- rename files into their original names
- remove install
- add .stow-local-ignore
Add newsbeuters config
Add rtorrent.rc
Move shell stuff into correct files

- move environment variables into bash_profile
- move readline configurations into inputrc
- move bash configurations into bashrc
- use $- to see if running interactively
Add binds for vi-mode in inputrc

- replicate Page{Up,Down} and Ctrl-l functionality in vi-mode