Removed the sequential functions from the Engine class

examples/analytical-function/example_analytical_function_testSequential.py

@@ -234,18 +234,28 @@ if __name__ == "__main__":
     This part of the code tests the available combinations of the 
     sequential strategies.
     The following combinations have remaining issues to be solved:
-        - exploitation = 'BayesOptDesign' has circular dependency with the engine class
         - exploration = 'Voronoi' creates mismatching numbers of candidates and weights
         - exploration = 'loocv' needs MetaModel.create_ModelError, which does not exist
         - exploration = 'dual annealing' restricted in what it allows as exploitation methods
         - tradeoff = 'adaptive' perhaps not possible in the first AL iteration?
         
     The following combinations are running through:
-        - BayesActDesign quite fast
-        - VarOptDesign as well
+        Tradeoff
+        - None
+        - equal
+        - epsilon-decreasing
+        Exploration
+        - random
+        - global_mc
+        Exploitation
+        - BayesActDesign
+        - VarOptDesign
+        - alphabetic
+        - space-filling
         
     Performance notes:
         - BayesOptDesign slow in the OptBayesianDesign iterations
+        - exploitation = 'BayesOptDesign' has circular dependency with the engine class
         
     # TODO: user-defined options were left out in this test for both 
     sampling-methods and exploitation schemes.