Set effective permissions during hardcopy creation

Previously, generating a hardcopy wouldn't include the modified problem header
(which lists the pg file path) even though the effective user had permission to
see this information. This was because the hardcopy generation omitted the
value from the environment and this commit adds the missing value.
Merge pull request #92 from mgage/develop

Tweak comments in localOverrides,  Fix default order of "assign to all vs assign to one" in HomeworksetsEditor2

Comments about OPL/NPL may not be right yet, but this is an improvement
Fix wording in comment.
Fix typo
Merge pull request #93 from jwj61/develop

Develop
Merge pull request #94 from bldewolf/master

Adding pg paths to hardcopies
Change Path ... to Show path/Hide path.
Merge branch 'develop' of github.com:openwebwork/webwork2 into develop
Make solution knowls work in library browser 1
Merge pull request #98 from jwj61/develop

develop
Fix comment that used C style comment tags and replace them with HTML comment tags
Merge branch 'develop' of https://github.com/openwebwork/webwork2 into develop