Account for appendices with numbers as well as another level of interpretations
Use node_types for clarity
Merge pull request #482 from cmc333333/z-interp-fixes

Tweaks for Z's Interpretations
Starting to add subparts to the TOC - this is the backend work, with minimal template changes
Fixing tests based on new TOC changes
Ignore subparts in the diff view for sections
PEP8 and pyflakes changes
Removed print
Added tests
Merge pull request #484 from khandelwal/search_cou

Adding Subparts to the Table of Contents
initial subpart heading styles
move drawer content class to nav tag
Merge pull request #485 from ascott1/Subpart-heading-styles

Initial subpart heading styles
small changes to diff view based on usability tests
re-add history tab highlight with diff view enabled
Merge pull request #486 from ascott1/diff-tab-highlight

re-add history tab highlight with diff view enabled
darken text and icons for interpretation slide downs
merge upstream
Merge pull request #487 from ascott1/usability-test-changes

Usability test changes
resize and tighten padding around subpart headings