Merge pull request #20 from randomecho/linkrot

Google Groups no longer supported, shut down May 2011
Give inline code some way to standout from rest of text

It's kind of hard to see the inline commands just off
on the font change alone.

Only targets the inline, as those in the PRE blocks
already have the yellow tint, and uses the same
background colour for consistency.
Merge pull request #21 from randomecho/markmeup-before-you-go-glow

Give inline code some way to standout from rest of text
Update progit.org links to git-scm.com

- Link to log man page also folded into one hosted on git-scm
- Expand "CC" into "Creative Commons" since it's the first time used
- Trimmed the Markdown ATX heading hashing to go with majority
  using the leading and not on both sides on same source page