Enabled restrictions on hints when reviewing through show_pop_hints and show_pop_hints_per_level.
Factored out common code.
Removed /review_hints, which was only recently added by me.
Merge pull request #1226 from code-dot-org/hint-ui

Improvements to hint review
Automatically built: commit 0d84fa833f31a40a40be83b4c06300049c5be733
Merge: c738010 c00e2f1
Author: Bjvanminnen <Bjvanminnen@gmail.com>
Date:   Fri Aug 15 16:59:14 2014 -0700

    Merge pull request #820 from code-dot-org/xmlFix

    <TITLE>foo</title> breaks on FF

commit c00e2f12b32ab65c7e4f4f0e861047e2b16aaa2a
Author: Brent Van Minnen <bjvanminnen@gmail.com>
Date:   Fri Aug 15 16:56:40 2014 -0700

    <TITLE>foo</title> breaks on FF
Merge pull request #1227 from code-dot-org/finished

DTD