Update readme to point to new separate documentation repository.
Remove empty quotes when category is empty.

When category = ""

Should print "category: " to file, current behaviour prints "category:
\"\"".

Latter creates an actual category, with a blank title. All posts created
since this update, without a category explicitly written in `rake`
command, or post directly edited, will belong to this category.
Simpler logic to category patch

Replace single line with cleaner, more readable Ruby.
Merge pull request #198 from parnmatt/patch-1

Remove empty quotes when category is empty.
Merge branch 'master' of github.com:quastdog/quastdog.github.com

* 'master' of github.com:quastdog/quastdog.github.com:
  Added category and tag to blog post
  New post, updated them to dinky
  Created "home page", modified config.yml settings
  Initial commit