lib/feedbook/errors.rb
require 'feedbook/errors/invalid_feed_url_error'
require 'feedbook/errors/invalid_interval_format_error'
require 'feedbook/errors/invalid_variables_format_error'
require 'feedbook/errors/no_configuration_file_error'
require 'feedbook/errors/parse_feed_error'
require 'feedbook/errors/no_configuration_file_error'
require 'feedbook/errors/template_syntax_error'
require 'feedbook/errors/unsupported_notifier_error'
require 'feedbook/errors/notifier_configuration_error'