Merge pull request ib-controller#20 from rlktradewright/master

Bug fix and trivial tidyings-up

Amend user guide to point out need for TWS to run in English.

Merge branch 'richard-pr10'

Version 2.11.0 (based on SVN commit message review)

Version 2.10.0 (based on SVN commit message review)

Version 2.9.0 (based on SVN commit message review)

Version 2.8.4.1 (based on SVN commit message review)