Added foreman for dev and test envs and removed RSpec version limiting.

Gemfile

@@ -88,7 +88,7 @@ gem 'diffy'
 # in production environments by default.
 group :development, :test do
 
-  gem 'rspec-rails', '~> 3.5'
+  gem 'rspec-rails'
   gem 'test-unit'
   gem 'spring'
   gem 'spring-commands-rspec'
@@ -121,6 +121,10 @@ group :development, :test do
 
   # Use Factory Girl for generating random test data
   gem 'factory_girl_rails'
+
+  # for easy starting of all processes via Procfile
+  # run "foreman start"
+  gem 'foreman'
 end
 
 gem 'puma', group: :puma