Template: Ensure setup script works

`bin/setup` fails the first time because `dev.rake` calls `db:setup`.
The default `bin/setup` script calls `db:prepare`, which works no matter
what.

Author: stevepolitodesign

lib/install/web.rb

@@ -6,6 +6,7 @@
   run "bundle install"
 
   generate "suspenders:install:web"
+  rails_command "db:prepare"
 
   say "\nCongratulations! You just pulled our suspenders."
 end