setup run via dotfiles fails when ~/.vim directory does not exist

[gsterndale]

Run via rcupup fails:

$ cd ~
$ ls -la .vim
ls: .vim: No such file or directory
~ $ rcupup
Current branch master is up to date.
identical /Users/gsterndale/.gitconfig.local
...
identical /Users/gsterndale/.zshrc
running post-up hooks for /Users/gsterndale/.promptworks-dotfiles
fatal: Not a git repository (or any of the parent directories): .git
mv: rename /Users/gsterndale/.vim to /Users/gsterndale/.vim.bak/.vim: Directory not empty
Vim: Warning: Input is not from a terminal
E282: Cannot read from "/Users/gsterndale/.vim/vimrc.bundles"
Press ENTER or type command to continue

Run via standalone works:

~ $ cd ~
~ $ rm -rf .vim
~ $ bash < <(curl -Ls https://github.com/promptworks/promptworks.vim/raw/master/setup.sh)
Cloning into '/Users/gsterndale/.vim'...
remote: Counting objects: 785, done.
remote: Compressing objects: 100% (28/28), done.
remote: Total 785 (delta 17), reused 4 (delta 4), pack-reused 751
Receiving objects: 100% (785/785), 138.22 KiB | 0 bytes/s, done.
Resolving deltas: 100% (357/357), done.
Checking connectivity... done.
Vim: Warning: Input is not from a terminal

[nicholaides]

Fixed