Putting background image where it belongs
Adding explicit rules to copy image files to Makefile.  This is needed
because some versions of Jekyll only copy image files that are
referenced by HTML pages, and *not* image files that are referenced
by CSS (like our background image).  Safest thing is to always check
everything, even though it slows the build down by about 10 seconds.
Taking out .htaccess rewrite rule that was turning /blog/yyyy/mm/*.jpg into /blog/yyyy/mm/*.jpg.html
Copying only one image file manually to shorten build times
1. Modified Makefile so that if `v3` and `v4` submodules aren't present, site will still build.
2. Improved documentation for `bin/categories.py` to explain proper usage.
3. Added complementary `bin/authors.py` and Makefile target to display list of blog post authors' names.
Fixing formatting of names in person includes
Adding pins to the map to show where instructors are (by closest
airport).  The airports_config.yml file is generated from admin data
and checked in here occasionally.  The code to toggle things
duplicates that used for toggling past bootcamps; that should be
refactored.
Merge pull request #33 from gvwilson/adding-instructor-locations-to-map

Adding pins to the map to show where instructors are
Escaping quote characters properly in names of airports
Adding Jens von der Linden to the team
Updating badge list
Blog post from Indiana
Linking to Justin Kitzes' personal site
Fixing home page
Importing more bootcamps and making human-readable dates uniform
Another airport
Lightened font and search background for readability
Full-width page layout, and logo in navbar
Fixes based on Amy Brown's checking
Merge pull request #3 from pipitone/navbar-readability

Lightened font and search background for readability