3.5.3: updates Gemfile for PostgreSQL support for local development and test databases.
Add Guard gems to Gemfile
Guardfile - initial state, as auto generated by running guard init rspec
Guard: updated Guardfile with custom additions from railstutorial Listing 3.35.
Add Spork gems to Gemfile.
Spork: adding spec_helper.rb as it was auto generated after spork --bootstrap
Spork: updated spec_helper to move everythign into the prefork section, and added --drb to .rspec so it doesn't have to be typed each time
Spork + Guard: updated Guardfile for Spork support
Adding database schema, created after changing to PostgreSQL