get-my-ip.py: Add a script for getting your public IP address

This will help students connect to each other on the LAN during class.
Note that if you ping a host across a NAT, you'll get your IP inside
the NAT, not the NAT's IP.
get-my-ip.py: Python 2.x sockets can't be used in 'with' statements

They don't have __exit__.  Use an explicit try/except block to be
compatible with both 2.x and 3.x.
make: Remove this whole section

We don't teach compiled languages, so the need to teach build systems
is not very strong.  I also use Make to help analyze my data, but
nobody has had the time or inclination to teach Make in a boot camp
yet (as far as I know).  Let's just remove this whole section.
Merge pull request #33 from wking/no-more-make

make: Remove this whole section
Adding README and instructor notes for new Python with ipythonblocks section.

This section will cover teaching basic Python via ipythonblocks.
Adding ipythonblocks module at version 1.5.
Adding material related to introducing students to RGB colors.
Adding material for "Playing with Blocks" section.

This section covers introductory Python such as indexing, variables,
for-loops, if-statements, and slicing.
Adding material for the "Building Blocks" section.

This section covers reading files and working with lists and strings.
Instructor notes for teaching git via collaboration on GitHub.

The focus of the lesson is to have students contribute to a repo on GitHub in
which we are building up a list of the things they are most interested in
learning at the boot camp. Requires everyone have a good internet connection
and that at least some of the participants sign up for GitHub.
Merge pull request #37 from jiffyclub/git-github

Instructor notes for teaching git via collaboration on GitHub
Merge remote-tracking branch 'wking/get-my-ip'

Adds a small Python script for getting your IP address on the local network.
Merge remote-tracking branch 'jiffyclub/ipythonblocks'

* jiffyclub/ipythonblocks:
  Adding material for the "Building Blocks" section.
  Adding material for "Playing with Blocks" section.
  Adding material related to introducing students to RGB colors.
  Adding ipythonblocks module at version 1.5.
  Adding README and instructor notes for new Python with ipythonblocks section.
Merge branch '2013-05-oxford-dtc' of git://github.com/swcarpentry/boot-camps into 2013-05-oxford-dtc
Imported content from the 2013-04-manchester branch as preferred this for a basis for the oxford boot camp.
Changed some of the examples and made various other small changes.
Made the ppt consistent with the modified README.md file and added a couple of slides on branching.
Changed the underlying example to be of building a web site as opposed to a references file. Made a number of other changes.