Strip vim entirely; EDITOR is nano

dissimulo does not use vim. Removes the editor, its config tree, its plugin
manager, and everything that would reinstall it on a re-bootstrap.

Deleted (82 files):
  vim/ (64)          the whole config tree, 1.7M
  doc/vim/ (8)       its documentation
  .vimrc, vimrc, .vim
  bin/yadr/vundle.rb, yadr-vim-{add,delete,list}-plugin
  bin/fix_macvim_external_display.sh   MacVim on macOS, dead here anyway
  vimify/            vi keybindings for readline/libedit, dropped on request

Edited:
  Rakefile        drop the vundle require, the vim install block, the
                  vundle_migration and install_vundle tasks, their two helper
                  methods, and the macvim homebrew line. Without this a
                  re-bootstrap would pull all of it straight back.
  install.sh      .vim/.vimrc out of the symlink list
  zsh/vi-mode.zsh EDITOR/VISUAL now nano. The zsh vi keybindings stay; they
                  are not vim.
  zsh/aliases.zsh yav/ydv/ylv, the MacVim detection block and ve removed;
                  ae/ze/gi now open nano
  git/gitconfig   mvimdiff mergetool removed, editor set to nano
  .tmux.conf      vim-tmux-navigator replaced with direct select-pane binds.
                  It ran ps piped to grep on EVERY C-h/j/k/l press to ask
                  whether vim held the pane: two forks per pane switch for a
                  question that can now only answer no. mode-keys and
                  status-keys vi stay, being tmux own key style, unrelated to
                  the editor.
  .gitignore/.dockerignore/Dockerfile   dead paths and the vim package

Also renames the installer banner to DRUNKENDOTFILES, piped through lolcat
when present with a plain-text fallback.

Left alone: the .yadr paths (renaming the checkout is a separate job), generic
swap-file ignores, the fasd viminfo support (third-party), and prose mentions.

zsh/aliases.zsh

@@ -13,9 +13,6 @@ elif [[ $unamestr == 'Darwin' ]]; then
 fi
 
 # YADR support
-alias yav='yadr vim-add-plugin'
-alias ydv='yadr vim-delete-plugin'
-alias ylv='yadr vim-list-plugin'
 alias yup='yadr update-plugins'
 alias yip='yadr init-plugins'
 
@@ -48,25 +45,16 @@ TRAPHUP() {
   source $yadr/zsh/aliases.zsh
 }
 
-alias ae='vim $yadr/zsh/aliases.zsh' #alias edit
+alias ae='nano $yadr/zsh/aliases.zsh' #alias edit
 alias ar='source $yadr/zsh/aliases.zsh'  #alias reload
 alias gar="killall -HUP -u \"$USER\" zsh"  #global alias reload
 
-# vim using
-mvim --version > /dev/null 2>&1
-MACVIM_INSTALLED=$?
-if [ $MACVIM_INSTALLED -eq 0 ]; then
-  alias vim="mvim -v"
-fi
 
-# mimic vim functions
 alias :q='exit'
 
-# vimrc editing
-alias ve='vim ~/.vimrc'
 
 # zsh profile editing
-alias ze='vim ~/.zshrc'
+alias ze='nano ~/.zshrc'
 
 # Git Aliases
 alias gs='git status'
@@ -77,7 +65,7 @@ alias gsa='git stash apply'
 alias gsh='git show'
 alias gshw='git show'
 alias gshow='git show'
-alias gi='vim .gitignore'
+alias gi='nano .gitignore'
 alias gcm='git ci -m'
 alias gcim='git ci -m'
 alias gci='git ci'

zsh/vi-mode.zsh

@@ -1,3 +1,3 @@
 set -o vi
-export EDITOR=vim
-export VISUAL=vim
+export EDITOR=nano
+export VISUAL=nano