but has been used in another project of mine.

* Makefile: Add variable CMH for the location of the library, and RPATH for a
  more central handling of the rpath.
* pari-gnump-user.c (pari_cmh_I2I4I6I10, pari_cmh_4theta, pari_cmh_10theta2):
  New functions.
* pari-gnump-user.h: Add new function prototypes.
* pari-gnump.h: Include cmh.h.