0.5.4:  Added legal gdpr/dsgvo info

0.5.3: Restrict sql index key length for utf8mb4 migration

0.5.2:
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    * Added serendipity_request_url API method
    
0.4: Properly use the example() API method by returning, not echo'ing. Unimportant update.    
0.3:
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Added og:image with the first image of an entry to head metadata.