separating tests for each mongo core class into individual files
Created PHPUnit config file. Created superclass for test files. Changed a few mongoCursor classes to PHP
Merge pull request #21 from 10gen-labs/gh7-mongotests

Gh7 mongotests
Merging now to set testing standard with each class in separate file
Merge branch 'bson-decoder-encoder' of https://github.com/10gen-labs/mongo-hhvm-driver into bson-decoder-encoder
Merge branch 'bson-decoder-encoder' of https://github.com/10gen-labs/mongo-hhvm-driver into bson-decoder-encoder
Fixed some syntax error with decoder