deal with the plotting section
Merge pull request #446 from gvwilson/adding-links-to-videos-for-instructors

Adding links to videos for instructors
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