update VERIFY_OUTPUT script and data.
add more files to sample_data/regular/tornado dataset
Fix assert() mistaken usage in FileReade.C
VERIFY_OUTPUT test data fix
Review Paraview Plugins for serial vtkOSUFlow
vtkOSUFlow uses CVectorField if input is vtkImageData
1. Fixed a wrong conversion of assert(x=f()); to x=f(); assert(x); in ParFlow.C, in the last commit, which would cause seg. fault when running MpiTest.
2. Fixed the same assert() issue in release mode in FileRead.C
3. Added vortex detection metric computation and flow field translation (TranslateField()).  Affected files: Field.*, Solution.*, VectorMatrix.*, OSUFlow.*.  Credit to Wenbin He.
4. Updated Paraview plugins in VTK integration.
5. Improved Testing.  You can now run testing script "tests/VERIFY_OUTPUT" easily when turning on WITH_TESTING using CMake.

git-svn-id: https://svn.mcs.anl.gov/repos/osuflow/trunk@319 6b533941-e25a-0410-8d37-8675ae1e3315
Merge branch 'svn_head'
Merge pull request #1 from GRAVITYLab/master

Please update to latest SVN revision (r319)