Fix the extra trailing '/' for symlinks

Following issues for pull requests holman#186 and holman#192.
Using the find flag '-H', which allows for following symlinks if the input is itself a symlink, without having to add any extra '/' that appears everywhere with all the symlinks. (Tested on Mac and Debian Linux) 
pull request holman#192 should be closed since I did change multiple files and the whole commit was messed up

Author: taherio

script/bootstrap

@@ -130,7 +130,7 @@ install_dotfiles () {
 
   local overwrite_all=false backup_all=false skip_all=false
 
-  for src in $(find "$DOTFILES_ROOT/" -maxdepth 2 -name '*.symlink')
+  for src in $(find -H "$DOTFILES_ROOT" -maxdepth 2 -name '*.symlink')
   do
     dst="$HOME/.$(basename "${src%.*}")"
     link_file "$src" "$dst"