Add pry and pry-rescue back to Gemfile

Author: estolfo

Gemfile

@@ -37,6 +37,8 @@ group :testing do
 end
 
 group :development do
+  gem 'pry', '~>0.9.0'
+  gem 'pry-rescue', '~>1.4.0'
   gem 'pry-nav', '~>0.2.0'
 end