[CIG-SHORT] PyLith 1.4.1 (fixes for source distribution)

[Brad Aagaard]

Hi all:

In response to some issues that Tabrez Ali found with the PyLith 1.4.0 
source distribution files, I have fixed the problems and posted new 
source distributions for PyLith (v1.4.1) and spatialdata (v0.5.2). The 
binary distributions are not affected by these issues, so v1.4.0 remains 
the current release for the binaries.

Summary of changes:

(1) The new default behavior is that the configure scripts for 
spatialdata and PyLith do not check for SWIG, because SWIG is not needed 
if building either package using the source distributions. If you are 
using the developer version from the repository, you will need to 
configure with --enable-swig so that SWIG will be used to generate the 
interface files.

(2) The same version of SWIG is used to generate the interface files for 
spatialdata and PyLith. The PyLith version 1.4.0 source distribution 
contained files generated by a different version of SWIG than the 
spatialdata version 0.5.1 source distribution. This led to discrepancies 
in the the signature of spatialdata types in spatialdata and PyLith, 
which caused runtime errors in the Python/C++ interface module.

Please report any problems building spatialdata or PyLith to 
cig-short at geodynamics.org.

Brad