do not rely on self._source in a liquid drop
add the sample filter from the 2houses PR
implement the json filter
documentation for the new filter/tag (json and for)
remove nil, empty and new line entries if the join option is passed to the for tag
attach a file to an email
typo when adding attachments in an email
merge the hosting branch into master: fix conflicts
use the locomotivecms engine version of the solid gem
fix conflicts with master about the sample filter