Document API change in hist
Merge pull request #2430 from neggert/hist_doc

Document API change in hist
Explict exceptions when setting locale.
Updated coding standards test to raise an exception containing the PEP8 failiures.
Merge pull request #2436 from mdboom/locale-explicit-exception

Catch explicit exceptions when setting locale.
Fixed failing PEP8 tests.
Use six.string_types instead of basestring.
Merge pull request #2439 from alefnula/remove-basestring

Use six.string_types instead of basestring.
Merge pull request #2099 from pelson/re-enable_pep8_test

Updated coding standards test to raise an exception containing the PEP8 failiures.
Merge remote-tracking branch 'upstream/v1.3.x'