Restore PGProblemEditor (the first one ) it's original look and feel

I'd like to have it around to contrast with the new look of PGProblemEditor2

At the moment it's not showing solutions in the problems
but that may be an issue with the Problem.pm
template display. ????
Merge branch 'master' of git://github.com/mgage/webwork2-dev into mgage
Merge branch 'master' of git://github.com/mgage/webwork2-dev into mgage
Merge branch 'master' of git://github.com/mgage/webwork2-dev into mgage
Merge branch 'master' of git://github.com/mgage/webwork2-dev into mgage
Merge branch 'master' of git://github.com/mgage/webwork2-dev into mgage
Merge branch 'subject_browse' into mgage
Merge branch 'master' of git://github.com/mgage/webwork2-dev into mgage

Conflicts:
	lib/WeBWorK/Authen.pm
	lib/WeBWorK/Authen/LTIBasic.pm

Resolved.
We have the new DragMath features
We have essayAnswers
and a bunch of other stuff.
Merge branch 'master' of git://github.com/mgage/webwork2-dev into mgage

Conflicts:
	lib/WeBWorK/Authen.pm
	lib/WeBWorK/Authen/LTIBasic.pm
Merge branch 'master' of git://github.com/mgage/webwork2-dev into mgage
Merge branch 'master' of git://github.com/mgage/webwork2-dev into mgage
Merge branch 'master' of git://github.com/mgage/webwork2-dev into mgage
Merge branch 'master' of git://github.com/mgage/webwork2-dev into mgage
Merge branch 'master' of git://github.com/mgage/webwork2-dev into mgage
Merge branch 'master' of git://github.com/mgage/webwork2-dev into mgage
Fix (again) the check for the library version number

The correct syntax should be   $version >= "2"    not $version==2 (as I changed it to)
nor  $version => 2  as it was originally.
Change version number to 2.5.2.1

This version has a different database schema.  It's possible to upgrade courses to this  but
it might not be so easy to move them back to this.
Update themes

Move conf/templates to conf/old_templates to avoid accidental references to old files

Add link to code mirror to math, math2, math3
Update README's and LICENSE
Preperation for merging to mgage