.gitconfig: Remove exclusions that should never be in dotfiles checkout directory
.gitconfig: Introduce modular include-able config files
.gitignore: Ignore local config files, vim cache files
.vimrc: Support .vimrc.local
.gitignore: Ignore .vim/cache/
.vim: Switch to use junegunn/vim-plug as plugin manager Stop tracking vim plugins as discrete submodules. Instead use junegunn/vim-plug to manage installing and updating plugins. This allows maintaining the plugin list via my .vimrc file.
.gitignore: Ignore .vim/spell/
Add .gitignore; add .gitignore_global support