Shortened shell curriculum

Removed several unnecessary instruction steps, unnecessary descriptions, and redundant exercises to shorten the curriculum. Also tightened up some language.
Formatting
Merge pull request #42 from kliph/2014-01-uwmadison

2014 01 uwmadison. Writing Code for People - Cliff Fixes
fixing typos and cleared up a couple confusing sentences.
make git default editor nano, so users do not drop to vi if the -m commit flag is missing
fixing typos in readme markdown for python testing section
small changes to readme and python file to keep examples in sync, make the example exception clearer
Match ReadmeSolns.md to Readme.md

Removed exercises that were removed from Readme.md
Shortened Automation curriculum

Proofread and removed "rm -i" portion
Proofread ReadmeSolns.md for Automation
Automation Readme.md: Made "Loops" a bonus
Shell: Updated github repo address and branch
Merge pull request #43 from aronnem/2014-01-uwmadison

2014 01 uwmadison aronnem changes
Update README.md

Added Instructor names
Updated times according schedule in Curriculum Assignments and gh-pages brach: _posts/2014-01-13-uwmadison/index.html
Recombine version control and branching.
Style tweak on horizontal line.
fixing breadcrumbs for sane ordering
Fix link to presentation and date of XKCD comic
Fix URL to be the correct branch
Rename automatino to best practice.