Bringing in changes on the master branch
Merge branch 'bc-namespaced-python' of git://tremily.us/swc-setup-windows-installer

* 'bc-namespaced-python' of git://tremily.us/swc-setup-windows-installer:
  swc-windows-installer.py: Install the sqlite3 shell
  swc-windows-installer.py: Generalize msysGit download link
  swc-windows-installer.py: Force UNIX-style \n line endings for ~/nano.rc
  swc-windows-installer.py: Use POSIX paths for ~/nano.rc
  swc-windows-installer.py: Use '~' in ~/nano.rc includes
  swc-windows-installer.py: Rename ~/.nanorc to ~/nano.rc
  swc-windows-installer.py: Install nano source syntax highlighters

Conflicts:
	setup/swc-windows-installer.py

This resolves a conflict in the Windows installer comments between my
branch and changes from #389 [1].  Joon felt like we should match our
suggested bootcamp installation instructions (which recommend the
limited Git for Windows), but I prefer the more generic msysGit (as I
explain in 4fe28c0e, swc-windows-installer.py: Generalize msysGit
download link, 2014-03-27).  Ethan feels like it isn't a big deal
either way, so I'm going with my version ;).

[1]: https://github.com/swcarpentry/bc/pull/389
Optimize max_features instead of n_estimators

Useless to estimate n_estimators, the more the better!
Use a Pipeline to add feature scaling
More explanation of how to create new lessons
Merge branch 'master' into worked-example
Moving Python climate data example into 'extras' directory
Fixing a few typos
Merge pull request #382 from gvwilson/worked-example

Worked example of working with climate data (wrap-up to novice Python lesson)
Merge pull request #395 from stephenturner/master

ggplot2 lesson for teaching swc assignment
Moving ggplot2 example into extras directory
Merge pull request #450 from gvwilson/relocating-ggplot2-example

Moving ggplot2 example into extras directory
Adding image files produced from IPython Notebooks
1.  Adding pointer to IRC channel.
2.  Removing book.md during `make tidy`.
Putting '$' at the front of shell commands just like we do in lessons.
Merge pull request #428 from gvwilson/splitting-makefile

Simplifying Makefile and adding documentation.
turn off evaluation for 'help(apply') chunk
build first two lessons' md files
update ggplot2 example README after adding ggplot examples and lengthenning lesson
Merge pull request #453 from stephenturner/ggplot2-lesson

update ggplot2 example README after adding ggplot examples