added '--clean_build_ext' to invoke clean before building
added '--clean_build_ext' to invoke clean before building

Invoke setup.py clean && setup.py build_ext --inplace

dan-blanchard/conda-build,frol/conda-build,ilastik/conda-build,sandhujasmine/conda-build,dan-blanchard/conda-build,rmcgibbo/conda-build,frol/conda-build,rmcgibbo/conda-build,ilastik/conda-build,mwcraig/conda-build,sandhujasmine/conda-build,sandhujasmine/conda-build,ilastik/conda-build,rmcgibbo/conda-build,mwcraig/conda-build,dan-blanchard/conda-build,frol/conda-build,mwcraig/conda-build