Fix login (Closes #658)
Add KeekIE()
Add tests for keek
Credit Osama Khalid for Keek support
Fix delayed title display in --console-title

With Python 3, the titlebar wouldn't get updated for a long time (due to
stderr buffering), and when it did, the title would be shown as b'...'
representation.
Merge branch 'master' into use-other-downloaders
Regen the executable.