Revert "Revert "Merge pull request #95 from stewartoallen/at-pull-remove-jsonp-support""

This reverts commit e06ae4d9443a6aabd1ff87e5373761b3856ae963.
Minion should allow accept, username headers for CORS; revert change to spawn2 index.html; change task.log.js to get json rather than jsonp

Signed-off-by: Ted Pearson <ted@addthis.com>