* Touch up readme info graphics

* Add layers to easily recreate the single steps
* Re-group objects
* Transform white rectangles for interrupting arrows into paths
* Adapt rectangle path forms to make arrow interruptions nicer
* Centre repository names in their repository boxes
* Add simple to hack to remove double rounded border problem in step 3
* Set background colour to white (was transparent before)
* Update repo cloning graphics to reflect changes in SVG file; optipng'ed
* Fix newline problems in repo cloning graphics SVG

* Remove superfluous newlines
* Add missing newline at end of file
Merge pull request #388 from stevenkoenig/fix-readme-info-gfx

Fix readme info gfx
Add link to older installers for Git for OS X

The current Git installer for OS X is broken for many pre-10.8
systems. The older installers seem to solve this problem.
Merging work done on master branch since November 2013 tag
Merge pull request #460 from gvwilson/gh-pages

Merging all changes done since November 2013 tag.
The filename `aux` was reserved in the days of DOS, and that proscription has been retained to the present day. This PR therefore renames the recently-created `aux` directory to `misc` so that people can pull this repository on Windows.
Merge pull request #465 from gvwilson/gh-pages

Renaming aux to misc to avoid problems on Windows.
Relocating first episode of lecture on web data syndication
Putting files and directories in alphabetical order
New lesson on producing and syndicating data
Putting file/directory names in alphabetical order
Starting to work on the HTML portion of the lesson
*   Simplified Makefile and added documentation.
*   New and improved Windows installer.
*   Updated ggplot2 example.
*   Renamed the `aux` directory to `misc` (since `aux` conflicts with Windows filesystem conventions).
*   Added image files produced from IPython Notebooks.
*   Added climate data example as wrap-up to Python lessons.
*   Added links to how-to videos for instructors.
*   Added lesson on `doit`.
*   Added lesson on multiprocessing in Python.
*   Added `bin/swc_index_validator.py` to check formatting of bootcamp home pages.
*   Put rules for compiling IPython Notebooks into separate `ipynb.mk` Makefile.
*   Created `bin/setup-bootcamp.sh` to create and fill a bootcamp repository.
*   Removing deprecated lesson material.
*   Many small changes to lessons, glossary, formatting, etc.
Merge pull request #530 from gvwilson/gh-pages

Bringing in changes April-June 2014
* Add small changes to README.md
* Add clarifications to CONTRIBUTING.md
* Split 'Locations and Formats'
* Rewrite 'Formats' paragraph
* Remove superfluous newline
* Remove superfluous <br />s
* Make the word 'Makefile' stand out
* Fix Markdown mark-up