Merge pull request #227 from StefTweet/2.1

Updated the day 17/11 to 20/11/2012
Fix typo after last "big" update commit
Fix typo after last "big" update commit
Fix typos after last "big" update commit
Fix typo after last "big" update commit
Fix formulation after last "big" update commit
Fix formulation after last "big" update commit
Fix typo after last "big" update commit
Fix typo after last "big" update commit
Fix typo after last "big" update commit
Fix typo after last "big" update commit