Fix comment for ForceTwsApiPort ooption.

The improved implementation no longer causes console errors to be
logged.
Update user guide

Improve user guide, in particular include  step by step instructions,
and add more details about securing password information.

Additional information on setting up multiple IBController instances.

Create a PDF version for inclusion in the distribution zip.
Correct sample IBController.ini file

Some settings had the wrong initial values
Rename and update the shell scripts

Remove 'sample' from the start of the script names, as it's superfluous
(and more work for the user to rename the files sensibly).

Bring the scripts into line with the recommendations in the User Guide.
Add sample scheduled task definition

For import into Windows Task Scheduler, allowing automated daily start
of TWS.
Merge pull request #9 from rlktradewright/Documentation_and_sample_file_changes

Documentation and sample file changes