The previous commit reveals too much information about the system.  With
this change only modules of the processed package are expanded.  The
expanded path reaches no deeper than the package's root.

The table of file names written to the c or cpp file contains absolute
file paths.  This affects, in particular, profiling.  The c method
__pyx_TraceCall takes as one of its arguments a file name, which will be
read from the table of file names.

replace PyMapping_Keys() usage by safer code (PyMapping_Keys() may return a tuple, but we try to sort it as a list afterwards)

streamline non-C-function fallback code for the 1-arg call case to avoid overhead beyond the type checks

simplify WithTargetAssignmentStatNode and make it more robust against replacements of the context manager node; undo node.result() checking as it broke TempNode's disposal code

when replacing SimpleCallNode with PyMethodCallNode, make sure we replace all cloned references to the node, not only the current one

--HG--
extra : amend_source : a1b27560de97695dde4b9fea41a39f7f10de736c

--HG--
extra : transplant_source : %E7%F6%F6%0F%80%3A%B2%BDs%7E%8D%80p%2AYX%3B%08%DBL

Mark PyErr_SetInterrupt as nogil

speed up method calls a little by inlining CPython's method_call() and avoiding duplicate args tuple packing

--HG--
extra : amend_source : 52480a79feadc93a60bdeee1837a31bf3539b327

Added PyPy 3 to the build matrix

add "meteor_contest" benchmark as demo of a program that Cython cannot speed up very much as the bulk of the work (set operations) is in CPython's own code