BUG: take out the disable cli modules flag

Issue #37
BUG: fix python tests for VTK6

Same fix as compiling for VTK6, SetImage -> SetImageData
Fixes:
 py_ReportingSelfTest
 py_LabelToDICOMSEGConverterSelfTest
Merge pull request #41 from naucoin/FixVTK6Tests

Fix vtk6 tests by using SetImageData