Add a FAQ section to README.md

[Elv13]

• How to add/remove tag with keybindings (thanks sochotnicky)
• How to emulate and absolute index
• How to assign dynamic keybindings

[sochotnicky]

Deleting tag is relatively simple:
awful.key({ modkey, }, "d", function () awful.tag.delete() end)

I also made rename working using following keybinding:

 awful.key({ modkey,           }, "r",
              function ()
                 awful.prompt.run({ prompt = "New tag name: " },
                                  mypromptbox[mouse.screen].widget,
                                  function(new_name)
                                     if not new_name or #new_name == 0 then
                                        return
                                     else
                                        local screen = mouse.screen
                                        local tag = awful.tag.selected(screen)
                                        if tag then
                                           tag.name = new_name
                                        end
                                     end
                                  end)
              end)

In the end I also found solution for adding:

awful.key({ modkey,           }, "a",
        function ()
                  awful.prompt.run({ prompt = "New tag name: " },
                    mypromptbox[mouse.screen].widget,
                    function(new_name)
                        if not new_name or #new_name == 0 then
                            return
                        else
                            props = {selected = true}
                            if tyrannical.tags_by_name[new_name] then
                               props = tyrannical.tags_by_name[new_name]
                            end
                            t = awful.tag.add(new_name, props)
                            awful.tag.viewonly(t)
                        end
                    end
                    )
        end),

[Elv13]

Yes, there is a bug with exec_once, it have been reported before, I will fix that. tyrannical.tags is mostly undocumented, this need to be fixed too