Updates for RSS

- Adds site title to feed
- Adds site description to feed
- Removes HTML markup from post titles.
- Removes post metadata from body of post
Fixed spelling of 'sentence' in site meta description field placeholder text
Merge pull request #43 from Swampson/typo-fix

Fixed spelling of 'sentence' in site meta description field placeholder ...
Merge pull request #41 from nikf/master

Updates for RSS Generation