let CPython do the exception instantiation on 'raise' in Py3 to make sure we handle all special cases correctly

--HG--
extra : transplant_source : %D5%D9Izb%7F%E6%AF%91%9A2j%25%FC%27%85%7CFs5

setup.py: [0.19.x] Use setuptools when invoked with bdist_{egg,wheel}.

This makes it easier to build eggs and wheels of 0.19.x releases; the
master branch already uses setuptools.

    * Fix self / other typecode compatibility check and add test

    * In CPython, PyErr_BadArgument() C-API function always raises an
      exception and returns zero

    * It is needed to add the `except -2` clause, so that the exception
      raised by PyErr_BadArgument() is not ignored

    * Additionaly, the `return -1` statement in array.extend() will have
      no effect, and hence is misleading, so it needs to be removed
Signed-off-by: Yury V. Zaytsev <yury@shurup.com>

--HG--
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--HG--
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--HG--
extra : transplant_source : %93%13%FC%AA%07x%7D%14%F7E%D8%C0%01%DC%40%1C%BF%0F%F6S

--HG--
rename : docs/src/userguide/tutorial.rst => docs/src/tutorial/cython_tutorial.rst
extra : transplant_source : %97%AD%B6%9D%2A%0F%11a-%9F%F2%C6%BBOe%95%CD%CAX9

--HG--
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--HG--
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--HG--
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--HG--
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--HG--
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--HG--
extra : transplant_source : Zp%DC%BB8%03%B2%D6%A3%09q%13%25%17%AD6%17%25%1FU

--HG--
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--HG--
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--HG--
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--HG--
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--HG--
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--HG--
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--HG--
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--HG--
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There was a word missing.

--HG--
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