Wait until the flash object is loaded before looking for a camera.
Merge pull request #944 from edx/diana/fix-camera-detection

Wait for flash to load before trying to detect a camera
Force a save of the model when we're uploading a photo ID so our generated key is always saved.
Merge pull request #949 from edx/ormsbee/force_save_on_photo_id_upload

Force save of photo_id_key on upload
Re-enable signature checking for Software Secure callbacks
Merge pull request #952 from edx/ormsbee/ss_msg_signing

Re-enable signature checking of Software Secure postbacks
Merge commit '8194eedc' into edx-west/rc-20130912