* clutter/clutter-behaviour-ellipse.c:
        Remove uneeded knot signal

        * clutter/clutter-behaviour-path.c:
        Fix so knot signal is emitted only when a knot is reached.

        * clutter/clutter-effect.c:
        * clutter/clutter-effect.h:
        Add a scale effect.

        * configure.ac:
        * doc/manual/Makefile.am:
        * doc/manual/clutter-manual.xml.in:
        * doc/manual/manual.xsl:
        * doc/manual/style.css:
        Add various bits for application developers manual.