add backup script, cleanup link script

* add initial stab at a backup script to copy existing files to a backup directory
* clean up unused code in link.sh

install/link.sh

@@ -6,7 +6,7 @@ echo -e "\nCreating symlinks"
 echo "=============================="
 linkables=$( find -H "$DOTFILES" -maxdepth 3 -name '*.symlink' )
 for file in $linkables ; do
-    target="$HOME/.$( basename $file ".symlink" )"
+    target="$HOME/.$( basename $file '.symlink' )"
     if [ -e $target ]; then
         echo "~${target#$HOME} already exists... Skipping."
     else
@@ -47,8 +47,6 @@ vimfiles[~/.vim]=$DOTFILES/config/nvim
 vimfiles[~/.vimrc]=$DOTFILES/config/nvim/init.vim
 
 for file in "${!vimfiles[@]}"; do
-# for file in "${(@k)vimfiles}"; do
-    # echo "$file -> $vimfiles[$file]"
     if [ -e ${file} ]; then
         echo "${file} already exists... skipping"
     else