postpone import of distutils Extension type in test runner in case setuptools gets imported in between

postpone import of distutils Extension type in test runner in case setuptools gets imported in between

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extra : transplant_source : %9B%C2%08Q%DDt%9A%99%A4%CAK%5D%8F%3A%A9%E4F%19%96%CD

fix test runner and pyximport in Py 2.7.9 and 3.4+: setuptools replaces "distutils.dist.Distribution" *after* we import it, which then breaks the input validation in "distutils.cmd"

fix test runner and pyximport in Py 2.7.9 and 3.4+: setuptools replaces "distutils.dist.Distribution" *after* we import it, which then breaks the input validation in "distutils.cmd"

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extra : transplant_source : %3A%84%AC%02E%17%D8%EE%E64Mpv%25%A3%8E%8B%E5%CA%19

Minor cleanup (2.5 compat, mostly)

optimize general sorted(x) calls

fix shrinking and overflow in cpython.array

optimize sorted([a,b,c]) into PyList_Sort call

Emit DL_IMPORT macro for python3

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extra : transplant_source : %C6%5B%E6p%A8%07V%04%CC%8D%EB%12%BB%A2%87%B5%D3%9A%F0%60

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extra : transplant_source : %0Dr%DFY%8A%EF%F6%C1%9C/h%B5%23%CE3_%DCE%B2%03

implement PEP 479: replace accidental StopIteration exceptions that exit the generator body by RuntimeError

fix temp leak and crash when assigning a C value to both a Python and C target in a cascaded assignment

clean up regular expression in parser (not problematic as it only matches what the scanner already accepted)