Add -t option to allow easy test selection.

Action verbose option correctly.
Tweak operation counts. Add empty and new instances tests.
Enable comparisons across different warp factors. Change version.

Tools/pybench/Setup.py

@@ -17,11 +17,16 @@ Number_of_rounds = 10
 Warp_factor = 20
 
 # Import tests
+#from Empty import *
 from Arithmetic import *
 from Calls import *
 from Constructs import *
 from Lookups import *
 from Instances import *
+try:
+    from NewInstances import *
+except:
+    print "Cannot test new-style objects"
 from Lists import *
 from Tuples import *
 from Dict import *