Merge pull request #62 from apawlik/2013-04-manchester

Version control and part of the Python material
Bring bash materials from 2012-10-oxford tag
Convert to LibreOffice format.
Modified the Download Materials slide.
Inevitable conversion to LibreOffice format. Added note about
script -f and changed download instructions.
Removed .ppt and .doc file (they have been translated to
LibreOffice format).
Rearranging files
More deck-chair rearranging.
Adding "cd shell" to instructions.
Merge branch '2013-04-manchester' of https://github.com/swcarpentry/boot-camps into 2013-04-manchester
Merge pull request #64 from apawlik/2013-04-manchester

Fixed some typos and added to Python material
Added link to Etherpad
Removed EGI-specific slide
Reworded exception introduction
Reordered introduction of expected-run-compare description and nose introduction
Added command-line examples of nose.tools assert functions
Changed assert_true example
upper-class -> upper-case
Merge branch '2013-04-manchester' of https://github.com/swcarpentry/boot-camps into 2013-04-manchester
Merge pull request #65 from mikej888/2013-04-manchester

Final Manchester updates.