Ensure we get a header when issuing fakeServerDeletion r=asuth
Merge pull request #161 from lightsofapollo/actually-delete-messages-in-tests

Ensure we get a header when issuing fakeServerDeletion
Add space gaurd for timezone detection r=asuth
Merge pull request #162 from lightsofapollo/fix-timezone-detect-onosx

Add space gaurd for timezone detection r=asuth
Bug 839273 - Add gaurds to protect jobs utilizing
_partitionAndAccessFoldersSequentially from processing null headers and skip
folders that have no headers present. r=asuth
Merge pull request #163 from lightsofapollo/bug-839273-dont-send-empty-headers

Only return found headers in storage.getMessageHeaders
Bug 826118 - [email/IMAP] Connection loss may not always result in error messages during synchronization, synchronization for the folder will break until app is restarted.
IMAP server jobs need the deathback updated/cleared too.
Add withConnection and resetErrorHandling to imap/folder, to help the use of folderConn in _accessFolderForMutation to be less aware of the actual deathback setting and reseting
Use clearErrorHandler instead of resetErrorHandling