Catch up with Caja's IE11 adjustments


git-svn-id: http://es-lab.googlecode.com/svn/trunk@835 aeea10e6-ec39-11de-83d8-6d5adf01d787
Some temporary diagnostics in debug.js
Fix titles.
Catch contract up to explicit


git-svn-id: http://es-lab.googlecode.com/svn/trunk@836 aeea10e6-ec39-11de-83d8-6d5adf01d787
Tolerate initial " at " in err.stack, as seen on IE11


git-svn-id: http://es-lab.googlecode.com/svn/trunk@837 aeea10e6-ec39-11de-83d8-6d5adf01d787


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