Update README and install

- Unset multi-select option with +m

install

@@ -112,7 +112,7 @@ __fsel() {
 
 __fcd() {
   local dir
-  dir=$(find ${1:-*} -path '*/\.*' -prune -o -type d -print 2> /dev/null | fzf) && printf 'cd %q' "$dir"
+  dir=$(find ${1:-*} -path '*/\.*' -prune -o -type d -print 2> /dev/null | fzf +m) && printf 'cd %q' "$dir"
 }
 
 if [ -z "$(set -o | grep '^vi.*on')" ]; then