Fixed a display bug with contextLimitedFactor.pl
Merge pull request #147 from goehle/readbug

Fixing read_whole_problem_file bug
Added encode_pg_and_html subroutine that encodes all html, ev3 and pgml special characters.  I also made a bunch of changes to different files to use the new subroutine.
Merge branch 'master' of https://github.com/openwebwork/pg into encodebug2

Conflicts:
	macros/PG.pl
Fixing somethings and reverting some unintended changes.
Fixing my fixes.
More polish on encoding pg and html.
Reverting unneccessary changes.
Reverting additional changes.
Avoid error messages from comparisons to strings and in testing for when the formula agrees with the previous one typed by the student.
Merge pull request #173 from dpvc/patch-implicit-plane

Fixes "undefined $ld" error message with ImplicitPlane objects  

Ok, sounds good. The changes for this pull request check out then.
Fix problem where original MathObjects get converted to Currency class when passed to Currency(). Resolves issue #171
Merge pull request #174 from dpvc/patch-currency

Fix problem where Currency($r) changes the class of $r.

OK.  This does fix the original issue as described.
Merge pull request #169 from goehle/encodebug2

Encode PG Special Characters  (Develop)
added back in alternative division operators; it was only the alternatives for addition and subtraction causing trouble as Davide's comment in pull request 118 explains
Merge pull request #118 from Alex-Jordan/bizarroArithmetic

Bizarro arithmetic
Merge branch 'develop' of https://github.com/openwebwork/pg into access

Conflicts:
	macros/PGessaymacros.pl