[Insight-developers] itk_common dashboard script update

[Brad King]

Hi Folks,

I've modified the standard itk_common.cmake dashboard script in the
ITK dashboard branch:

   http://itk.org/gitweb?p=ITK.git;a=commitdiff;h=b3eb643e

This configures the ITK builds to store ExternalData objects persistently
outside the source and build trees.  This will not affect testing results
because the content of the objects is stateless.  However, it will reduce
problems due to network failure and reduce the workload on the servers
that provide the data.

This optimization is of increasing importance as more and more DATA{}
references are added to ITK.  Soon I will merge a change that removes
the entire Testing/Data submodule and replaces it with a real directory
containing *.md5 content links for *all* the old data.

Please update your ITK dashboard scripts to use the new version.

Thanks,
-Brad