created mailgun_helper_spec.rb and mailgun_spec.rb files
tests for loaded libraries in mailgun_spec.rb
adding context to mailgu_helper_rspec.rb
Done tests for create_mailbox method
Small fixes on require libraries
added unit tests for generators/*.rb
Merge pull request #34 from alexspot/develop

added unit tests for generators/*.rb
fixed rake tasks
Merge pull request #35 from alexspot/develop

fixed rake tasks
developed email_spec.rb
made code convention refactoring in email_spec.rb
Tests added to data_storage_spec.rb
refactored data_storage_spec.rb
Merge pull request #37 from trofymenko/develop

Tests added to data_storage_spec.rb
improved code (syntax only) according to 'code conventions'
added double-indentations in few blocks of code
deleted some ugly code-indentation (with 'end' mostly) according to 'code convention'. Hope it`s final commit.
Merge pull request #36 from Sergey-Russiyan/develop

Please, review my code.
Merge branch 'develop' of https://github.com/romikoops/howitzer into kurenkov
Completed tests for mailgun_helper.rb