* add collection endpoint
* show featured posts
* more consistant wording
* backwards compatibility with php7.x
* compatibility with php5.6
* use ACTIVITYPUB_AUTHORIZED_FETCH instead
because the ACTIVITYPUB_SECURE_MODE could be misinterpreted with disabling the security mechanisms completely.
* the blog user follows all authors of a blog
if not in single_user mode
* phpdoc
* adding changes based on feedback from @jeherve
* global namespace
* better hashtag handling
should also fix#373#239
thanks @jeherve for help and feedback!
* fix workflow
