Restructure bootstrap dir, fix install.sh

With bootstrap files no longer linked to config directory, we can have
an easier directory structure with less nesting for them. Install.sh
needs to use the new structure when calling its bootstrap scripts.

bootstrap/autostow.sh

@@ -0,0 +1,100 @@
+#!/usr/bin/env bash
+#
+# autostow.sh
+#
+# Stow automatic symlinking script
+#
+# Invokes stow for every folder within this repository, and that's it.
+
+ignore="${AUTOSTOW_IGNORED_DIRS:-"bootstrap:assets"}"
+
+main() {
+  case "$1" in
+  -s | --stow)
+    have_stow
+    echo "Creating dotfile symlinks ................................................."
+    stow_dirs
+    echo "Done creating symlinks ...................................................."
+    exit 0
+    ;;
+  -d | --delete)
+    have_stow
+    echo "Removing dotfile symlinks ................................................."
+    unstow_dirs
+    echo "Done removing symlinks ...................................................."
+    exit 0
+    ;;
+  -v | --version)
+    printf "System bootstrap script.\n\n©Marty Oehme\n\nVersion: 0.2\n"
+    ;;
+  -h | --help | *)
+    usage
+    exit 0
+    ;;
+  esac
+  shift
+}
+
+stow_dirs() {
+  for d in */; do
+
+    if is_ignored "$d"; then
+      printf "ignoring %s\n" "$d"
+      continue
+    fi
+
+    printf "stowing %s\n" "$d"
+    stow -S -t ~ "$d"
+  done
+}
+
+unstow_dirs() {
+  for d in */; do
+
+    if is_ignored "$d"; then
+      printf "ignoring %s\n" "$d"
+      continue
+    fi
+
+    printf "unstowing %s\n" "$d"
+    stow -D -t ~ "$d"
+  done
+}
+
+is_ignored() {
+  IFS=":"
+  for ign in $ignore; do
+    if [ "$ign" == "$1" ] || [ "$ign/" == "$1" ]; then
+      return 0
+    fi
+  done
+  return 1
+}
+
+have_stow() {
+  if ! type stow >/dev/null 2>&1; then
+    printf "GNU stow needs to be installed for this script to function. Please install stow through your package manager.\n"
+    exit 1
+  fi
+}
+
+usage() {
+  printf "%s\n" \
+    "" \
+    " autostow.sh - Automatically stow your dotfiles." \
+    "               Uses GNU stow to set up automatic links to any dotfiles in subdirectories of this directory." \
+    "" \
+    " Usage: stow.sh -dhs" \
+    "" \
+    " Options:" \
+    "" \
+    "     -h     Print out this help." \
+    "" \
+    "     -s     Install dotfiles, by symlinking any directory found next to stow.sh using GNU stow." \
+    "" \
+    "     -d     Remove dotfiles, by unlinking any directory found next to stow.sh using GNU stow." \
+    "" \
+    ""
+}
+
+main "$@"