* main_scheck.ml: disable cache by default
* main_scheck.ml: progress meter
* lang_php/analyze/checker/error_php.ml: simpler rank ints
* tests/php/scheck/Makefile:
scheck: check for keyword arguments passed to function expecting a reference

Summary: This is bad. PHP does not do what you expect him to do (how surprising ...)

Test Plan: ./scheck -test

Reviewers: lovro, pieter

Reviewed By: pieter

CC: julienv, amenghra, zoel

Differential Revision: https://phabricator.fb.com/D752024