Issue 1688 reject unexpected macro block code instead of getting into a loop

git-svn-id: https://zxing.googlecode.com/svn/trunk@2807 59b500cc-1b3d-0410-9834-0bbf25fbcc57
Issue 1676 retune ITF slightly to avoid a misread

git-svn-id: https://zxing.googlecode.com/svn/trunk@2808 59b500cc-1b3d-0410-9834-0bbf25fbcc57
Avoid AIOOBE, again, with over large correction for nudge in corner cases

git-svn-id: https://zxing.googlecode.com/svn/trunk@2809 59b500cc-1b3d-0410-9834-0bbf25fbcc57
Rewrote Japanese help pages