* After trying to install py_minc on Ubuntu 12.04 Precise against commit f1077df034
from the BIC-MNI/minc-toolkit repostiry on GitHub, I ran into some compile errors. The
first were warnings of the form:

src/volume_io_wrapper.c:129:25: error 'NC_UNSPECIFIED' undeclared ...

This is defined in minc.h, and so I included this header in volume_io_wrapper.c This had
to be done similarly in VolumeIO_constants.c

* Secondly, the function declaration for create_grid_transform and create_grid_transform_no_copy
from volume_io/vol_io_prototypes.h (part of the MINC libraries) is different compared to
the regural libminc, and has an additional argument:

VIOAPI void create_grid_transform(
  VIO_General_transform *transform,
  VIO_Volume displacement_volume,
  VIO_STR displacement_volume_file );

This has to be included in the src/VolumeIO_a.i file which swig uses to access the functions
in the minc library.