Introduced configuration files

- Added rails_config, pry-rails and hirb gems
- Updated CustomErrors module to use Settings configuration
- Updated mailer to use Settings configuration
Added HTTParty to Gemfile
Added SlackService
Passing in Category and Event Name to Slack
Add Spec for SlackService in Hangouts Controller
Specs for SlackService
Moving over to module from class
Using Non-Persisted Models instead of mocks and doubles
Removed HTTParty in favor of Net::HTTP and using initializer for setting the constant
removed content_for tag
moved events specific js into a separate file
deleted redundant files
refactored specs
refactored specs after code review
Removed pagination from users index page

- because Sam didn't like it
added Guard to Gemfile
added Guard plugins
commented out require 'autorun' to avoid Guard running specs twice
removed guard-jasmine
added config/Guardfile
moved Guarfile into root
Disabling live-compile
Add Projects and Events to precompile list