Added support for URLs as provided in WWfeedback messages

I had inadvertently provided an older version of CAS.pm when submitting
the original version.  This brings CAS.pm up to date.  The only change
was/is to add support to keep params on the URL being sent to the CAS server
(so that URLs provided by WWfeedback messages work properly).
Fixed copyright date, and minor code cleanup
Merge pull request #74 from paulvojta/master

CAS.pm:  update to current version, and some minor code changes
Fixed typo in authen_CAS.conf.dist
Enable comma escaping, unicode chars in classlists

Classlists files as processed by the addcourse script can't deal with users
who, for one reason or another, has a comma in either their first or last
name. Using the Text::CSV module for CSV parsing instead of split() enables
comma escaping values by putting them in double quotes.

Users who have non-ASCII characters in their name gets their name (e.g.:
Frøystein) mangled after going through addcourse. This commit forces Perl
to open the the classlist file with UTF8 encoding. This way the unicode
characters survive intact into the database.
Merge pull request #75 from ionparticle/master

Enable comma escaping, unicode chars in classlists
Fixed OPL-update to symlink applets to web accessible directory
OPL-update now symlinks swf applets in the OPL to webwork2/htdocs/applets so they can be used in problems easily
Merge pull request #76 from aubreyja/master

OPL-update now symlinks swf applets in OPL to web-accessible location in applet search path
Merge branch 'master' of https://github.com/openwebwork/webwork2-dev