Todas as referências à 17 foram atualizadas para 18, para suportar a nova VM.

Todas as referências à 17 foram atualizadas para 18, para suportar a nova VM.
Adicionado "Aguarde..." na página principal.
Arquivos modificados:
	modified:   account/templates/account/inscricao_minicurso.html
	modified:   account/views.py
	modified:   fabfile.py
	modified:   management/templates/emails/course_notification-subject.html
	modified:   management/templates/management/courses_expel_message.html
	modified:   management/templates/management/payment_notification.html
	modified:   management/views/attendance.py
	modified:   management/views/courses.py
	modified:   semcomp/celery.py
	modified:   semcomp/settings/base.py
	modified:   semcomp/settings/prod.py
	modified:   semcomp_contact_form/forms.py
	modified:   semcomp_contact_form/models.py
	modified:   semcomp_contact_form/templates/contact_form/contact_form_message.html
	modified:   semcomp_contact_form/templates/contact_form/contact_form_message.txt
	modified:   semcomp_contact_form/templates/contact_form/contact_form_message_sender.html
	modified:   semcomp_contact_form/templates/contact_form/contact_form_message_sender.txt
	modified:   website/static/config-prod.rb
	new file:   website/static/img/background.png
	deleted:    website/static/img/email/logo-semcomp-17.png
	new file:   website/static/img/email/logo-semcomp.png
	modified:   website/static/img/header.png
	modified:   website/static/production/css/app.css
	modified:   website/templates/registration/activation_email.txt
	modified:   website/templates/website/base.html
	modified:   website/templates/website/home.html