Blog post with good/bad feedback from UW Room B (Matt and Doug).

Also includes a couple pictures, one linked in the post.
Fixing typo in Doug's name.
Merge pull request #332 from jiffyclub/uw-feedback-blog

Blog post with good/bad feedback from UW Room B (Matt and Doug)
Added mailing list info/sign up to contributing page, and some clean up.

Specifically, I merged the Report Bugs and Suggest Improvements into the Create
and new Discuss section. I removed stuff about creating new slides and audio
because that's no longer relevant.

Additionally, I added a Discuss section with links to the blog, announcement
mailing list, and the discussion mailing list. There is a form on the page
now that lets people (un)subscribe from the announcement mailing list.
Blog post on teaching with ipythonblocks at UW.
Merge branch 'master' of github.com:swcarpentry/website into bootcamps
Merge remote-tracking branch 'pipitone/mailing_list_signup'

* pipitone/mailing_list_signup:
  Added mailing list info/sign up to contributing page, and some clean up.
1. Adding 'bootcamps/staffing.html' page (generated from another repo).
2. Added links to it on the bootcamps/index.html page and the main menu.
3. Fixed a typo in an earlier blog post.
Merge pull request #333 from jiffyclub/blocks-blog-post

Blog post on teaching with ipythonblocks at UW
Fixed a tab and mismatched tag.
Slight revision to SWC teaching with ipythonblocks post.
Merge branch 'master' of github.com:swcarpentry/website into bootcamps