Fixed bug with Select method when selecting multiple properties.  Also
added Tests and Examples for Select Method.
Renamed Test File
Added Tests for Basic Queryables (Take, Skip, Count and Any).
Added GroupBy Tests
Added GroupBy method that doesn't require resultSelector.  Also added
GroupBy tests and examples.
Added Exception Unit Tests
Adds several basic methods (Single, First, etc), and added Dynamic object
versions of those methods for NET 4.0+ targets