discard useless (PyObject*) casts from values of builtin types which are PyObject* internally anyway (saves lots of C code)

--HG--
extra : amend_source : 240f49031159777036e1e6a139b6d736f59de337

fix C compiler warning when checking int overflow for division by enum values on 32 bit systems (in case anyone cares...)

minor improvements in __Pyx_ArgTypeTest() and prevent it from raising C compiler warnings by inlining it

infer type of items in tuple/list constants on indexing (especially where all items have the same type)

--HG--
extra : amend_source : 1e8bf2d512c244f48654f43e37283d800e5d961a

improve type inference for string %/+/* operations and use more direct C-API calls for these unicode operations

--HG--
extra : amend_source : 6fe9294d38a26b208899453b4a12739dcc496c16

get rid of 'yellow last line' problem by assigning the function exit error handling and default value return code to the signature line instead of the last code line

disable autotestdict when testing under Py3.4 and adapt autotestdict tests to make up for its smarter docstring lookup