From numpy's definition in

https://github.com/numpy/numpy/blob/master/numpy/core/include/numpy/npy_common.h#L211

```typedef unsigned char npy_bool;```

optimise string equality comparison by always looking at the first character before calling into the C-API

--HG--
extra : amend_source : 65f946184bc3b291289c54f6787aba7d2ad43b20

--HG--
extra : amend_source : 068dca3eae20906b495571f1d80548dc5f99ed51

make fast path in Get/SetItemInt() utility functions safe for sizeof(index type) >= sizeof(Py_ssize_t)

add value range check for C level assignments to bytearray indices in order to mimic the safe Python behaviour

--HG--
rename : tests/run/ass2global.pyx => tests/run/ass2global.py

--HG--
rename : tests/run/str_ascii_auto_encoding.pyx => tests/run/bytearray_ascii_auto_encoding.pyx
rename : tests/run/str_default_auto_encoding.pyx => tests/run/bytearray_default_auto_encoding.pyx

No error checking for PyFloat_AS_DOUBLE() as documented

--HG--
extra : transplant_source : %D5%D9Izb%7F%E6%AF%91%9A2j%25%FC%27%85%7CFs5

--HG--
extra : amend_source : b6140bfd07fdf9ae0c7dde2037b3cbff682260e7

--HG--
rename : tests/run/bytesmethods.pyx => tests/run/bytearraymethods.pyx