Move assertAlmostEqual using delta out to separate class.
Move remaining assertAlmostEqual logic to separate class.
Move assertNotAlmostEqual using places out to separate class.
Consolidate test logic to be within specific AssertAlmostEqual classes.

Specifically, remove the shortcut from the AssertAlmostEqual class and
push it in to the AssertAlmostEqual{Places,Delta} test methods.
Define AssertNotAlmostEqualPlaces as the inverse of AssertAlmostEqualPlaces.
Move assertNotAlmostEqual using delta out to separate class.
Move assertNotAlmostEqual out to separate class.
Reorder assertion classes more logically.