SectionContent: Rename position to the more generic `type`
SectionContent: Rename position to the more generic `type`

michaelkuty/feincms,mjl/feincms,nickburlett/feincms,pjdelport/feincms,hgrimelid/feincms,matthiask/django-content-editor,matthiask/feincms2-content,nickburlett/feincms,joshuajonah/feincms,matthiask/django-content-editor,michaelkuty/feincms,feincms/feincms,nickburlett/feincms,feincms/feincms,nickburlett/feincms,pjdelport/feincms,matthiask/django-content-editor,matthiask/feincms2-content,mjl/feincms,michaelkuty/feincms,pjdelport/feincms,joshuajonah/feincms,michaelkuty/feincms,matthiask/feincms2-content,joshuajonah/feincms,hgrimelid/feincms,joshuajonah/feincms,feincms/feincms,matthiask/django-content-editor,mjl/feincms,hgrimelid/feincms