Fix 'freeze' demo

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extra : transplant_source : %D6h%3C%E4%02%B9%D5%D1%B0%95%5Bly.%18%B3%D20%A7%EC

Use more recent version of Python for documented examples

Implement PEP 465: dedicated infix operator for matrix multiplication

treat unknown (builtin) names as potential globals instead of requiring them to be builtins at runtime

DOC: Updates EPD references to refer to Canopy

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extra : transplant_source : %CA%BB%21%89%8CQ%A0F%3EN%E5%7Cs%01%5D%060A%C8%AF

make encoding setup code safer by not expecting sys.getdefaultencoding() to safely return a bytes object

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extra : transplant_source : cZx%3E%03l%AC%EDK%E3%C2%F2%2C%9BV%E5%EC%5D%B7%C8

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extra : transplant_source : M%D5%2C%C2%15%9E%3C%BC%3C%89%25n%95%DF%5C%B8%B5%C5%B8%D9

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extra : transplant_source : %F3%9A%B7r%F7%DB%C7%88%2B%D2%A4%9C%5E%0FT%B8_XS%D2

fix ASCII compatibility check in __Pyx_init_sys_getdefaultencoding_params(): strncmp() stops at first NUL byte which is the first byte in this case (i.e. no comparison is done at all)

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extra : transplant_source : A%2B%5BO%82%05%F7%DEm/%8Ao%08%121%96%8Ao%AB%8C

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extra : transplant_source : %CD%DB%8CT%85r%FF%0B%1C%60%B3%CD%F8%16%D8%E3%EC%C7%0BL

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extra : rebase_source : 4cc5a2b5b9044e06fca82d216aa5a3c919abf033

http://www.python.org/dev/peps/pep-0465/

New syntax: "c = a @ b" and "a @= b"

Includes a partial backport that works with the special methods at the Python level,
but not (properly) with extension types, which lack the necessary slot methods.  Also
currently lacks the subtype special casing that Python does for the numeric special
methods.