Add email templates

- Add the "reason membership" field to the approve view.
- Change email body from being hardcoded to file templates.
- Create the following email templates: contact_form_en,
contact_form_pt, member_approved_en, member_approved_pt,
member_confirm_en, member_confirm_pt, member_reject_en,
member_reject_pt, member_reject_reason_en, member_reject_reason_pt,
new_member_en, new_member_pt, reset_pass_en, reset_pass_pt
Merge remote-tracking branch 'origin/master'

Conflicts:
	application/controllers/contacts.php
	application/controllers/members.php
	application/views/members_view.php