refs #94
Merge branch 'issue-94' of git://github.com/twillouer/fongo into twillouer-issue-94

Conflicts:
	src/main/java/com/foursquare/fongo/impl/ExpressionParser.java
	src/main/java/com/mongodb/FongoDBCollection.java
	src/test/java/com/foursquare/fongo/FongoTest.java