use __Pyx_PyObject_GetAttrStr() in some more places
add test for absolute imports
improve error message on slice deletion
fix crash in staticmethods without explicit positional argument (ticket 804)
fix compiler crash
store GIL state in temp variable to safely keep it across generator yields (fixes ticket 803)

--HG--
extra : rebase_source : 5fd93f1cf2916c987bfc4a4d410bf4a77afb2ac9
avoid GIL state temp overhead in sections that do not contain yields

--HG--
extra : rebase_source : 9be74b8a1d6509acf415bf667558a635b38a902f
changelog

--HG--
extra : rebase_source : 889ca43dd6769a6208f8c69e36f2103468b3b546
fix 'with nogil' blocks inside of generators in C++ mode
Properly decref objects held by fused functions
Fix fused tp_clear function prototype
Remove duplicate DECREF, tp_clear does it already
Add test for the fused type refcounting issue
Merge pull request #198 from pv/bug/fused-refcount

BUG: fix reference counting bug in fused type method descriptor
refactor comprehensions by removing separate target node (to simplify a future length-hint optimisation)

--HG--
extra : rebase_source : 476b22eeaeaea1ff69ee8069328fb47ffe18ea20