Death to apostrophes

Addresses:
https://hypothes.is/a/9g2GokMBTJiuYLZ7WSVBtg
https://hypothes.is/a/4taRbrstT4a_X_RDV3b8Sg
https://hypothes.is/a/loeRBB1DQ32-mKxF0093pw
Fix some header template pasting issues
Change site.name to site.title

HTML has no notion of name. I kept typing site.title.
Add Atom and RSS feeds

Straight Liquid templated versions. Less magic. More easy.
Add feed-related vars to _config; Fix Author URL