Add some needed tweaks.

These are changes I’ve been making to each site as I do them, so it
makes sense to bring them into the base theme.
Center align siteTitle at phone-ish size.
Add header-row class.
Oppose plone grid css for above and below content port lets.
Form tweaks to make Bootstrap and Diazo play nice.
Add navigation portlet tweaks.
Update to Bootstrap 3.2.0
Override a Plone column setting.
Replace portal-globalnav with Bootstrap navbar.
Recompile Bootstrap with proper container-lg width.
Use portal-globalnav. diazo-v3 will use Bootstrap nav.
Tweaks for footer portlets.

These tweaks are necessary after disabling columns.css on Plone sites.
Add GA.