Added pre requisite check (mongo, elastic-search, php-mongodb), updated .travis.yml
Added an upgrade section
updated travis.yml
Improved testing
Update Makefile
update travis.yml
update travis.yml
update travis.yml
update travis.yml
update travis.yml
update travis.yml
update travis.yml
update travis.yml
update travis.yml
update travis.yml
update travis.yml
update travis.yml
update travis.yml
update travis.yml
update travis.yml