Add strspn to string.pxd

Fixed .srctree tests execution

fix compiler crash on bad code (complex % x) and move directive handling in ModNode to analysis phase

Resolve depends attribute with respect to include_dirs.

T808

--HG--
rename : tests/run/unicode_ascii_encoding.pyx => tests/run/str_ascii_auto_encoding.pyx
rename : tests/run/unicode_default_encoding.pyx => tests/run/str_default_auto_encoding.pyx
rename : tests/run/unicode_ascii_encoding.pyx => tests/run/unicode_ascii_auto_encoding.pyx
rename : tests/run/unicode_default_encoding.pyx => tests/run/unicode_default_auto_encoding.pyx

Doing so just makes all methods implicitly nogil. This also makes nogil
on a cdef extern from statement do the right thing to cppclasses (and
their methods) contained inside.
---
 Cython/Compiler/Parsing.py  |    3 ++-
 tests/compile/cpp_nogil.h   |    9 +++++++++
 tests/compile/cpp_nogil.pyx |   18 ++++++++++++++++++
 3 files changed, 29 insertions(+), 1 deletion(-)
 create mode 100644 tests/compile/cpp_nogil.h
 create mode 100644 tests/compile/cpp_nogil.pyx

clean up dependencies of memoryview utility code snippets a bit to get rid of some 'unused function' C compiler warnings

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