Automatically process all templates as dotfiles

Using the 'dotfiles_project' node attribute (which should be set in your
soloistrc file), we grab all the files and template them automatically.
This avoids having to explicitly list which templates to template.
Add vimrc configs

- this is a vimrc.after because currently using Janus
Add irb configs override to use Pry

Specifically useful for `bundle console`. The irb command will still
bring up irb, if needed.
Pryrc config for debugging aliases
Don't install ri and rdoc for gems