Add MongoDate Test file
Add MongoDB::command()
Add MongoCollection::count()
Add MongoCollection::drop()
Add MongoCollection::getName()
Add BSON::ETYPE_BOOL
Add MongoCollection::update()
Add MongoCollection::save()
Add MongoCollection::validate()
Add MongoCollection::__toString()
Merge pull request #4 from thawkins/master

Add MongoDate Test file and other functions