work around inability to detect existing Python globals (e.g. from imports) when cpdef-ing global functions

Relax stride check for zero- and one-sized dimensions

remove redundant importing overhead for newly built test module in test runner and make sure we always import exactly the one we just built

Naive approach to fix memview incref/decref asymmetry in transpose

--HG--
extra : rebase_source : 9a5bbb4f08a0eb5be71afd48d9ad5566d8a39efc

--HG--
extra : rebase_source : fb47cc7e0154abb172016f1945dad2968b3f2a3e

Non-Wrapped Inline Declaration Breaking Compatibility with C89 Compilers

Explain difference between cdef and cpdef

Add casting to const

--HG--
rename : tests/compile/ext_attribute_cache.pyx => tests/run/ext_attribute_cache.pyx

enable Py_TPFLAGS_HAVE_VERSION_TAG on extension types by default (also in Py2) and provide 'type_version_tag' option to disable it