encoder: fix deadlock when the encoding is done

the timeout triggers a timeout that calls next_file again
Fix backgrounds in the categories templates
encoder: fix segfault disposing the encoder
encoder: disconnect the signals sooner
Updated FSF's address
Bump release 0.20.2
Fix negotiation with 30fps
editor: fix setting of queue properties
Account in stats plays with no team but players tagged
Escape strings in more places
Add plays by groups instead of one by one
Bump release 0.20.3
Use ksvideosrc instead of dshowvideosrc
Force a default width for video standards

Leaving the width free can result in event widths that
some encoders don't support for instance
Integrate COE plugins build in the build system
Customize for COES