Merge pull request #3188 from jrgm/train-2013.03.29

bump version and update changelog for #3153, #3172, #3178
Remove stray underscore leftover. Might fix #3153...
Add tests to exercise invalid/expired cert code, check for context fetch errors.

cleanupIdentities takes a proper failure callback now.
Merge pull request #3190 from 6a68/train-2013.03.29--add-underscore-fix

Train 2013.03.29  add underscore fix
bump version and updated changelog; #3153 is on this branch