Merge pull request #33 from openwebwork/hotfix1

Fix version typos, Fix bad link to www.openwebwork.org, fix typo for default path to OPL in localOverrides.conf.dist
Adding new matrix macro files.
Merge branch 'master' of github.com:openwebwork/pg
Changed the behavior of "always_show_hint" and "always_show_solution" permission settings so that they do not take effect when generating a hardcopy.

Unintended Side Effect:  The only way that hints were shown in hardcopies was via the "always_show_hint" setting.  This change makes hints unavailable in hardcopy for everybody.
Fixed 2703 in the manner suggested by Mike.  I commented out character escaping in "problemPreserveAnswer.pl" because it is done earlier now.
Implemented Davide's suggestions.
Removed problemPreserveAnswers from anywhere I could find it.
Merge pull request #51 from goehle/bugfixes

Merging your fixes.  (As a practice, I'd like to see a separate pull for each bug, rather than mixing them together.  That makes it clearer which changes are for which bug, and makes it easier to back out of changes if there ends up being a problem.  Here, the fixes for dollar signs are mixed in with the fixes for the printing of hints.)
Update PGessaymacros.pl

Roll back HTML::Scubber a bit to allow <'s
removing scrubber
Backport pull request #54 (allow errors from adaptive parameters to appear in the message area)
Merge pull request #58 from dpvc/hotfix/2.7-FormulaUpToConstant

Backport pull request #54 as a hotfix to v2.7
Merge branch 'master' of http://github.com/openwebwork/pg into bugfixes

Conflicts:
	macros/PGessaymacros.pl
Merge pull request #52 from goehle/bugfixes

I'm going to break protocol and merge this.  The reason is that scrubber has already been removed from webwork2/master, which means that it is no longer available in PG.  Consequently essay answers are broken until this gets merged.
Update PGessaymacros.pl
Fix resetting of context flags when using Compute (they used to leave reduceConstants and reduceConstantFunctions incorrectly set)
Add correct_ans_latex_string to values not to be inherited (fixes wrong display when a Computed calue is used in a perl expression)
Fix the ijk() method to honor the texStrings/normalStrings value, and also accept a 'string' or 'TeX' value as a parameter
Added codeshard class to answer arrays so that they can be attached to
by mathviewer
Merge pull request #70 from goehle/codeshard

Class "codeshard" added to answer rule extension (for MathView).

Looks fine.