The requirement to call add_signal() was added to catch typos. However, this
requirement became increasingly annoying with property::<name> signals and e.g.
gears.object allowing arbitrary properties to be changed.
All of this ended up in a single commit because tests/examples fails if I first
let add_signal() emit a deprecation warning.
Signed-off-by: Uli Schlachter <psychon@znc.in>
Tags are accessible as s.tags on a screen object. Yup, that's harder to find
than a variable that is defined in the default config, but such is life.
Now that awful.rules supports specifying tags by name, I guess that the number
one reason for needing the tags table is gone.
Signed-off-by: Uli Schlachter <psychon@znc.in>