Log message:
Update phabricator and friends to latest stable branches.
There's been no upadte here for over a year and noting all the changes
there-in would be futile here.

The important change is that Phabricator now works with php-7.1.x.

Log message:
Extract using bsdtar, failed with plain tar for me.

Log message:
Import libphutil-20160301 as devel/libphutil.

libphutil Library System A system for organizing, loading and introspecting PHP
classes and functions. Uses static analysis to generate, validate and update
library contents and includes. Based on Facebook's similar flib system.