Handle 'raw_input' --> 'input' via Bio._py3k.builtins
Replace 'raw_input' with Python3 style 'input' via Bio._py3k.builtins
Don't need the 2to3 raw_input fixer anymore.

$ 2to3 --no-diffs -n -w -f raw_input Bio BioSQL Tests Doc Scripts
RefactoringTool: No files need to be modified.