Add support for new compoundProblem method
Fix many of the annoying warning messages about undefined values and redefined functions
make sure included files are scanned for BEGIN_SOLUTION, etc.
Modify knowlLink to accommodate updated version of knowl.js

Updated knowl.js from the AIM website -- allows HERE doc version of knowls.

I was going to implement this change myself but this version from AIM
beat me to it, does it better -- and it's the standard distributed version.

There are accompanying changes to knowlLink in PGbasicmacros.pl to
accomodate the new version.
Merge pull request #7 from openwebwork/master

UPdate from  openwebwork pg-dev
Merge branch 'master' into pg2.5.1 -- updating and syncing

Conflicts:
	macros/contextLimitedPolynomial.pl
Add support for new compoundProblem method
Merge remote-tracking branch 'origin/pg2.5.2' into pg2.5.1

Updating to make sure no commits have been lost.
Update contextArbitraryString to handle multi-line input, and to properly output all characters in student answers
Merge pull request #24 from dpvc/ArbitraryString

Update contextArbitraryString to handle multi-line input
Merge pull request #9 from mgage/pg2.5.1

Pg2.5.1
Merge pull request #26 from mgage/master

update pg2.5.1  from mgage/pg-dev master
backing out of modifications to reduce error messages
Merge pull request #27 from mgage/master

Pg2.5.1 update
Commit revised fix for log warning messages.

It seems likely that the original fix was ok, but there were some debugging warning messages left in that were causing trouble.
Merge pull request #28 from mgage/master

Reapply a corrected version of the fix
Changed redefinition of >< to pull from Vector frather than from Complex
Return isHash definition to original

Check to see if this original definition realy does throw
warning messages to the logs.  If it does we'll need to
modify it to check for the existence of $self.
Merge pull request #29 from mgage/master

Revisions responding to suggestions by DPVC
Adjust def of isHash to prevent warning messages in log