Redmine#4096: filter(), grep(), every(), some(), none() support for data containers
Redmine#4096: min(), max(), mean(), variance() support for data containers
Redmine#4096: join() support for data containers
libpromises/evalfunction.c: rename JsonPrimitiveAsString to JsonPrimitiveToString
Merge pull request #1344 from tzz/feature/filter-containers

Redmine#4096: filter(), grep(), every(), some(), none(), join(), min(), max(), mean(), variance() support for data containers