Add dotenv-rails gem for loading ENV variables
Add essential gems for testing

Add shoulda-matchers, factory_girl_rails, & capybara gems to :test group
Add rspec-rails gen to :test + :development groups
Generate RSpec install files (spec_helper.rb & .rspec)
Add '--format documentation' option to .rspec file
Add gems to enhance the Rails console

Add jazz_hands gem to :test + :development groups

Includes the following gems:

- pry                - powerful shell alternative to IRB
- pry-debugger       - turn the console into a simple debugger
- pry-stack_explorer - navigate the call stack and frames
- pry-rails          - additional console commands
- pry-doc            - browse Ruby source directly from the console
- pry-git            - teach the console about Git
- pry-remote         - connect remotely to a Pry console
- hirb               - tabular collection output
- coolline & coderay - syntax highlighting as you type
- awesome_print      - stylish pretty print
Add gems for in-browser debugging

Add better_errors, binding_of_caller, & meta_request gems to :development