link element should reference cssgrids instead of deprecated grids.css
Fix Tree README
Fix a confusing typo in the Template user guide. Fixes #543
Merge branch 'live-docs' into dev-3.x
Replace political sample text with something a little less divisive.

I still feel really uncomfortable with how much of this example is lifted
straight from the Boston Globe (especially the hot-linked images), but I
don't have time to fix everything right now.
Merge branch 'live-docs' into dev-3.x