Help: Generate XML-compliant HTML5 compatible with hiutil 1.3 in Mountain Lion; fail to build when hiutil does.

Without this fix, anchors weren't being indexed, causing an error in the help window at initial Shroud startup, and the hiutil error messages, while appearing in the build log, did not stop the build.

Move documentation out of English.lproj while we're at it, since we don't run on 10.5 any more.
Old habits die hard.