remove unused imports; PEP8 cleanup
PEP8
Merge remote-tracking branch 'refs/remotes/upstream/master'
Merge remote-tracking branch 'refs/remotes/upstream/master'
Merge remote-tracking branch 'refs/remotes/upstream/master'
remove unused import
PEP8 formats
explicit imports and PEP8 whitespace
remove test file with no tests
PEP8 fixes in traits/tests/
Unit tests for the HasTraits.class_traits class method
Add test for dynamic range; update deprecated test methods.
Unit tests for Tuple trait
Merge from master.
Merge from master again.
Restore PEP8 cleanliness.
Merge branch 'master' into tst-more-unit-tests

Conflicts:
	traits/tests/test_range.py
Fix missing import.
Removed calls to assertItemsEqual
Fix MSVC build again