Log message:
Remove FETCH_USING.
It is a user-defined variable and should NOT be set in Makefiles.

Log message:
Import py27-jbessel-0.1.4 as wip/py-jbessel.

Bessel functions of the first kind, denoted as Ja(x), are solutions of Bessel's
differential equation that are finite at the origin (x = 0) for integer a, and
diverge as x approaches zero for negative non-integer a. The solution type
(e.g.,integer or non-integer) and normalization of Ja(x) are defined by its
properties below. It is possible to define the function by its Taylor series
expansion around x = 0.