PHPC-180: Cache the fixtures
PHPC-180: Cache the fixtures

Don't be regenerating the fixtures all the time, is super slow.
We now store them in /tmp/PHONGO-FIXTURES.json and read it from there,
as long as its mtime is newer then the fixtures-users.inc

Since we are caching these, bump the generated count to 1024 to force few roundtrips

xplodwild/mongo-php-driver-prototype,bjori/mongo-php-driver-prototype,mongodb-labs/mongo-php-driver-prototype,bjori/mongo-php-driver-prototype,mongodb/mongo-php-driver,derickr/mongo-php-driver-prototype,serebro/mongo-php-driver-prototype,10gen-labs/mongo-php-driver-prototype,mongodb-labs/mongo-php-driver-prototype,xplodwild/mongo-php-driver-prototype,serebro/mongo-php-driver-prototype,mongodb-labs/mongo-php-driver-prototype,xplodwild/mongo-php-driver-prototype,jmikola/mongo-php-driver-prototype,jmikola/mongo-php-driver,jmikola/mongo-php-driver-prototype,serebro/mongo-php-driver-prototype,derickr/mongo-php-driver-prototype,xplodwild/mongo-php-driver-prototype,derickr/mongo-php-driver,mongodb/mongo-php-driver,bjori/mongo-php-driver-prototype,jmikola/mongo-php-driver-prototype,serebro/mongo-php-driver-prototype,serebro/mongo-php-driver-prototype,mongodb/mongo-php-driver,10gen-labs/mongo-php-driver-prototype,10gen-labs/mongo-php-driver-prototype,jmikola/mongo-php-driver-prototype,mongodb-labs/mongo-php-driver-prototype,derickr/mongo-php-driver,derickr/mongo-php-driver,jmikola/mongo-php-driver,xplodwild/mongo-php-driver-prototype,derickr/mongo-php-driver,derickr/mongo-php-driver-prototype,10gen-labs/mongo-php-driver-prototype,bjori/mongo-php-driver-prototype,jmikola/mongo-php-driver,derickr/mongo-php-driver,jmikola/mongo-php-driver,derickr/mongo-php-driver-prototype,bjori/mongo-php-driver-prototype,derickr/mongo-php-driver-prototype,mongodb/mongo-php-driver,mongodb/mongo-php-driver,10gen-labs/mongo-php-driver-prototype,jmikola/mongo-php-driver-prototype,derickr/mongo-php-driver,jmikola/mongo-php-driver,mongodb-labs/mongo-php-driver-prototype