Important: #EXTBLOG-70 - Introduce publish date
See https://jira.typo3.com/browse/EXTBLOG-70
Description
This patch introduce a new field "publish_date" which replace the usage of crdate.
An UpgradeWizard copy the existing crdate value into the new field.
Impact
An existing installation must run the UpdateWizard, else the output is broken.
If use your own templates, ensure to use {post. instead of {post. in your templates.