C10 : Bessel functions

C10a:	$J$ , $Y$ , $H_{1}$ , $H_{2}$	(13 routines)
C10b:	$I$ , $K$	(18 routines)
C10c:	Kelvin functions	(8 routines)
C10d:	Airy and Scorer functions	(10 routines)
C10e:	Struve, Anger, and Weber functions	(0 routines)
C10f:	Integrals of Bessel functions	(0 routines)