pdf-from-msoffice.py: pep8 fixes
pdf-from-msoffice.py: Handle not finding 'convert'
pdf-from-msoffice.py: pep8 fixes
pdf-from-msoffice.py: Use cupsfilter instead of convert
  Mavericks does not have convert
tbb-install.py: Catch subprocess errors for install()
tbb-install.py: Remove .OLD install if it exists before renaming.
tbb-install: chown application after installation