Bug fix - fast scroll on large image set then quick debug toggle

The enqueued thumb downloads were finishing even after debug mode had changed and they were no longer relevant.
Fixed comment typo
Fixed fast scroll through big image set then back out to login page

Would crash if many image downloads were enqueued and you quickly backed out to login page while many downloads were in-process.
Fixed login lockup when no net connection
Merge pull request #59 from montehurd/loginLockup

Fixed login lockup when no net connection
Xcode wants to move these files. Fine, whatever.
Bump version to 1.0.3