straightened semantics, shortened constants
	Merge github.com:xwolfde/Piratenkleider
normalised Changelog.txt, straightened semantics (replacing "object" with "item")
added time-tag to comment date, moved itemprop=commenttime into time-tag
changed comment datetime function to comment_time('c')
added microdata item type Organization to header.php
added option in inc/constants.php to enter custom itemtype-Organization-names/description, added new functions piratenkleider_tag_schema_org_name and piratenkleider_tag_schema_org_desc in functions.php
substituted "name" with "headline" in article scope
fixed translation error
Merge pull request #184 from vaggi/master

Comment time not showing in structured data testing tool, itemtype Organization added