refatorado o filtro de email_report
Removes EmailReport.group_by_[status]
Refactors spec EmailReportControllerSpec
Moves search logic from EmailReportController#index to EmaiLReport.get_by_status_and_email_template_id
Fixes EmailReportsControllerSpec example
Moves order logic from EmailReportController#index to EmailReport.get_by_status_and_email_template_id
Moves get available email templates to EmailTemplates.available
Extract render methods logic from EmailTemplate to EmailTemplateRender
Merge pull request #20 from darkseid/refactor-email_template_render

Refactor email template render