TrajectoryGenerator: initCos.
TrajectoryGenerator: initCos.

	* share/urbi/trajectory-generator.u (initCos): New.
	(initSin): Adjust.
	(init): Use it.
	Sort bounces to init.

aldebaran/urbi,urbiforge/urbi,aldebaran/urbi,urbiforge/urbi,urbiforge/urbi,urbiforge/urbi,aldebaran/urbi,aldebaran/urbi,aldebaran/urbi,aldebaran/urbi,aldebaran/urbi,aldebaran/urbi,urbiforge/urbi,urbiforge/urbi,urbiforge/urbi,urbiforge/urbi,urbiforge/urbi