Modified blog posts to use real names, rather than keys into the 'people' table of the standard YML config, so that it would be easier for civilians to write posts.
Merge pull request #17 from gvwilson/using-names-instead-of-user-ids

Modified blog posts to use real names, rather than keys into the 'people...
1. Replaced category IDs with (string) category names: the extra level of indirection wasn't buying anyone anything.
2. Modified the preprocessor accordingly.
3. Wrote bin/categories.py to list categories and blog posts.
Now that blog posts use the names of people and categories directly,
we don't need the indirection tables in standard_config.yml, so they
have been deleted.
Updating documentation on writing blog posts
Merge pull request #18 from gvwilson/using-names-instead-of-category-ids

dUsing names instead of category ids
Adding Christopher Woods to the team
Adding Jory Schossau as an instructor
Blog post about the new instructors
Merge pull request #19 from gvwilson/badging-new-instructors

Blog post about the new instructors
Merge pull request #20 from gvwilson/adding-jory-schossau

Adding Jory Schossau as an instructor
Adding badges for new instructors
Merging badges for new instructors