Enabled another design test

Performing more dummy initialization in design.
testGetWrapper in test_design is no longer skipped.
Small bug fix in test.Wrapper

Forgot to negate the result from __eq__ when implementing __ne__.
Enabled another design test

Added more dummy initialization in design.
testGetArray in test_design is no longer skipped.
Enabled another design test

testGetComplex in test_design is no longer skipped.
Enabled another design test

Added more keyword arguments to Design.__init__().
testDesign in test_design is no longer skipped. This test should
really be renamed.
Added a dummy testDesign.xml.
Added more dummy initialization in design

Note that the change does not enable any new tests.
The testSetFixed test will still fail because fixed parameters
aren't enforced.
Enabled another design test

testSetValueForArrayElementWithOutOfRangeIndexShouldFail in
test_design is no longer skipped.
Enabled another design test

testExtendScope in test_design is no longer skipped.
Added rudimentary support for extending design scope and added
a dummy anotherTestDesign.xml file.
Added a reduceScope() method. Perhaps it should be be removed?
There's no such method in InPUT4j (both are in ElementCache).
Moved xml test files to test package