vimrc: add plugin fswitch

The fswitch plugin provided switching between header files and source
files.
vimrc: change F2 mapping
Xresources: new colors
i3status: replace PPP with VPN
zshrc: update
zprofile: update
vimrc: add clang_complete plugin
vimrc: add delimitMate plugin
zshrc: update
vimrc: update delimitMate options
i3config: update
major update