Restoring README.md broken by bad shell script
Add exercises to Python Basemap notebook

These exercises worked pretty well at the MIT SWC workshop, so I'm :+1: to merging them.
Merge pull request #276 from swcarpentry/gh-pages-merge

gh-pages merge
shell: Rename the new-style lessons from 'bash' to 'shell'

This is mostly about utilities with a few references to the basic
POSIX shell, and hardly at all about Bash itself (as distinct from
POSIX shells more generally).  'shell' is also consistent with the
existing:

* _includes/guide-shell
* lessons/ref/shell.html
* lessons/swc-shell
* lessons/thw-shell

If we weren't looking for a short-and-sweet directory name, I'd prefer
"Shell & Utilities" which the POSIX folks presumably put some thought
into [1] ;).  These lessons are mainly about generic POSIX concepts
(filesystem paths [2], basic utilities [3]).  However, I think calling
the directory 'posix' would confuse people :p.  'shell' is both
familiar, roughly accurate (because we use the shell to teach the
lessons), and not over-specific.  If you want to talk about
associative arrays (/shell/hash/intermediate? ;), than we're talking
Bash instead of POSIX ;).

[1]: http://pubs.opengroup.org/onlinepubs/9699919799/idx/xcu.html
[2]: http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap04.html#tag_04_12
[3]: http://pubs.opengroup.org/onlinepubs/9699919799/idx/utilities.html
Merge pull request #279 from wking/github-workflow-guide

CONTRIBUTING.md: Replace AstroPy links with GitHub's Flow guide
Merge pull request #278 from r-gaia-cs/map

Opt-out map in home page of bootcamps
Merge pull request #222 from wking/rename-bash-to-shell

shell: Rename the new-style lessons from 'bash' to 'shell'
Redoing the slides without Bootstrap or Reveal in our repo
Merge pull request #280 from rhiever/patch-1

Add exercises to Python Basemap notebook
Merge pull request #237 from ethanwhite/inter-python-2

First draft of second lecture of Intermediate Python
Updating slideshow
Fixing bad CDN link in slide layout
Preparing material for Version 5 novice release
Removing author name until we can include an accurate list of everyone
.mailmap: Standardize identifiers for Lynne and Matt
.mailmap: standardize identifiers for Joshua, Katy, Matt, and Sri
.mailmap: Flesh out with Aron, Cath, Christina, Lex, Molly, Scott, ...

... Steve, Trent, and Yuxi.

The previous two commits came from swcarpentry/boot-camps#9 and
swcarpentry/boot-camps#24.  This adds entries for other authors, as
far as I could determine from searching the GitHub and the wider net.
Automating installation on server
Merge pull request #288 from wking/mailmap-from-boot-camps-repo

Mailmap from boot camps repo
Merge branch 'master' into v5alpha