Added a ratings jade file.

Ratings are displayed above each article. The jade file checks if
ratings are enabled in the configuration locals object. If they are,
then any article tagged with one of the ratings will contain an image
displaying that article's rating.

Signed-off-by: Byron Sanchez <bfs5030@gmail.com>
Added jade file for generating the rss feed

Signed-off-by: Byron Sanchez <bfs5030@gmail.com>
Updated dependencies. Added wintersmith plugins.

Added the following wintersmith plugins:

  - wintersmith-articles-helper
  - wintersmith-handleize-helper
  - wintersmith-robotskirt
  - wintersmith-tag-pages

Signed-off-by: Byron Sanchez <byron@hackbytes.com>
Updated wintersmith-robotskirt configuration.

- Enabled smartypants
- Removed non-existing extension definitions

Signed-off-by: Byron Sanchez <byron@hackbytes.com>