Modified packaging scripts so that we no longer install Python into lib.
Debugging issues with packaging script.
Build scripts now first remove old install directory.
Minor cleanup in prepare.sh script.
Removed debugging statements from packaging scripts.
Merge pull request #746 from jchodera/fix-packaging-scripts

Modified packaging scripts so that we no longer install Python into lib
Disable PME stream on old versions of cufft
Merge pull request #748 from peastman/fftbug

Disable PME stream on old versions of cufft