ENH: Import tsaplots into tsa namespace. Closes #1359.
DOC: Add blurb about tsa.graphics import
Merge pull request #1374 from jseabold/tsa-plots-import

ENH: Import tsaplots into tsa namespace. Closes #1359.
DOC: Update backport notes for new workflow.
Merge pull request #1143 from jseabold/update-backport-docs

DOC: Update backport notes for new workflow.
STY: Remove unused import.
BLD: Comment out unused libraries. Closes #1094.
Merge pull request #1375 from jseabold/close-1094

STY: Remove unused imports and comment out unused libraries in setup.py
BUG: Fix typo.