Add a has_key calculator calsses to the project
Add code for calculating api hashkey
Add a SponsorPayApi::Parameters for working with parameters
Simplify code
Fetching data from a sponsorpay site
Add cassettes
Load a page without a content
Simplify code
Add validation for the header X-Sponsorpay-Response-Signature
Add spec for testing serveer response with wrong X-Sponsorpay-Response-Signature
Use more shorter variable name
Add gem bootstrap-sass
Remove welcome controller
Rename spec/controllers/welcome_controller_spec.rb  spec/controllers/queries_controller_spec.rb
Add queries_controller to the addp