refs #77 add test for $type
closes #77 handle some types
closes #78
Merge branch 'issue77' into release

Conflicts:
	src/main/java/com/foursquare/fongo/impl/ExpressionParser.java
	src/test/java/com/foursquare/fongo/FongoTest.java
Merge branch 'issue78' into release

Conflicts:
	src/test/java/com/foursquare/fongo/FongoTest.java