Update vimrc: add 'autocmd!' to augroups

Signed-off-by: Michael LeCompte <michaelslec98@gmail.com>
Update vimrc: augroup formatting

Signed-off-by: Michael LeCompte <michaelslec98@gmail.com>
Update vimrc: remove 'a' from formatoptions

Signed-off-by: Michael LeCompte <michaelslec98@gmail.com>
Update README.md: add vim-dispatch to plugin list

Signed-off-by: Michael LeCompte <michaelslec98@gmail.com>