R1:097e62b45c73

Use libphutil script initializer to initialize scripts in Phabricator

Summary:
libphutil has some basic environmental sanity checks that we should use when initializing scripts in Phabricator. Principally this:

https://secure.phabricator.com/diffusion/PHU/browse/master/scripts/__init_script__.php;db643ee9f5f524e7$26

Without this, the default ini may set CLI errors to go to some logfile, which means exceptions aren't shown on stderr.

See https://github.com/facebook/phabricator/issues/98/

Test Plan…