Updates to tile pattern and post gallery button fixes.
Merge pull request #375 from DoSomething/button-and-tile-fixes

Updates to tile pattern and post gallery button fixes.
Adding margin to h2 tags after ul tags
Merge pull request #376 from sbsmith86/list-paragraph-styling

Adding margin to h2 tags after ul tags
Release v5.3.4
Built assets for v5.3.4