CRM-15578 - crmMailing2 - Extract misc, simple directives

CRM-15578 - crmMailing2 - Extract misc, simple directives

<div crm-mailing-block-header-footer crm-mailing="mailing"/>
<div crm-mailing-block-mailing crm-mailing="mailing"/>
<div crm-mailing-block-preview crm-mailing="mailing"/>
<div crm-mailing-block-publication crm-mailing="mailing"/>
<div crm-mailing-block-responses crm-mailing="mailing"/>
<div crm-mailing-block-review crm-mailing="mailing"/>
<div crm-mailing-block-schedule crm-mailing="mailing"/>
<div crm-mailing-block-summary crm-mailing="mailing"/>
<div crm-mailing-block-tracking crm-mailing="mailing"/>
<div crm-mailing-body-html crm-mailing="mailing" />
<div crm-mailing-body-text crm-mailing="mailing" />