[Zope-dev] Moving all timezone support to use pytz in r81039

[Laurence Rowe]

> * Move all timezone usage to use pytz                                                                                            
> * Add support to timezone aware datetime conversion                                                                              
> * Correct capitalization of Brazil/DeNoronha                                                                                     
>                                                                                                                                  
> All previous timezone names are tested against the new pytz based timezones.                                                     
> This test shows that the following zones changed when pytz support was added                                                     
> (i.e. not in this commit):                                                                                                       
>                                                                                                                                  
> t1 = time.mktime(datetime(2002, 1, 1).timetuple())                                                                               
> t2 = time.mktime(datetime(2002, 7, 1).timetuple())                                                                               
> expected_failures = [ # zone.info(t1)     newzone.info(t1)     zone.info(t2)     newzone.info(t2)                                
>     'Jamaica',        # (-18000, 0, 'EST') (-18000, 0, 'EST') (-14400, 1, 'EDT') (-18000, 0, 'EST')                              
>     'Turkey',         # (10800, 0, 'EET') (7200, 0, 'EET') (14400, 1, 'EET DST') (10800, 1, 'EEST')                              
>     'Mexico/BajaSur', # (-25200, 0, 'MST') (-25200, 0, 'MST') (-25200, 0, 'MST') (-21600, 1, 'MDT')                              
>     'Mexico/General', # (-21600, 0, 'CST') (-21600, 0, 'CST') (-21600, 0, 'CST') (-18000, 1, 'CDT')                              
>     'Canada/Yukon',   # (-32400, 0, 'YST') (-28800, 0, 'PST') (-28800, 1, 'YDT') (-25200, 1, 'PDT')                              
>     'Brazil/West',    # (-10800, 1, 'WDT') (-14400, 0, 'AMT') (-14400, 0, 'WST') (-14400, 0, 'AMT')                              
>     'Brazil/Acre',    # (-14400, 1, 'ADT') (-18000, 0, 'ACT') (-18000, 0, 'AST') (-18000, 0, 'ACT')                              
>     ]                                                                                                                            
>                                                                                                                                  
> The most likely explanation for this is that the old database was out of date.

Old pickles should not break as only the timezone name (the _tz 
attribute) is stored on the pickle.

The old _timezone class, _zmap and _zlst are moved to tests/legacy.py so 
that they may be used in the compatibility test.

DateTimeZone.py is no longer used except for compatibility tests.

Laurence