quashing some unused variable warnings from the tests 

dropping a const to remove warnings

added python bindings

Multiple samples now allowed, but not assumed.
Index operator added to access other all samples, methods called as before are effectively passed on to item 0 in the collection.

refs #3641. First pass. It is known that the exact column list for the underlying tableworkspace is not confirmed.

Completely remove pointless methods. Didn't notice any warnings when I commented them out earlier anyway. Re #1944

Try to get system tests passing. This includes temporary renaming of a method on Instrument. Re #1944.

Add a copy constructor to Instrument. Oh, and go on a const-correctness hunt that led this commit to touch slightly more than just the one class. Re #1944.

Refs #3638: Filled in CoordTransformAligned; it runs 2.5-3x faster than the more general affine transform.

Refs #3638: Added a class CoordTransformAffine so as to make CoordTransform base class a bare abstract class.

Refs #3638: Added a stub for CoordTransformAligned. Reverted CoordTransform to use the bare data types instead of the wrapped parameter types, resulting in a 30% speed up.

refs #3577 #3578 #3579 #3580