function addCommand(k, fn, case)
    Commands[k] = Commands[k] or {}
    Commands[k][fn] = (case and true or false)
end

function removeCommands()
    for name,functions in pairs(Commands) do
        for fn in pairs(functions) do
            if fn then
                removeCommandHandler(name, fn)
            end
        end
    end
end

function installCommands()
    for name,functions in pairs(Commands) do
        for fn, case in pairs(functions) do
            if fn then
                addCommandHandler(name, fn, false, case)
            end
        end
    end
end