Merge pull request #30 from chives/dev

Added datasource_filter_count twig function counting fields with form
#29 merging datasource configuration
Merge pull request #31 from JarekW/dev

#29 merging datasource configuration
fix doc link in README file
Merge pull request #32 from JarekW/master

fix doc link in README file
Travis - add notifications
Merge pull request #33 from Wasper/wasper

Travis - add notifications
Added pagination test