Refactor CLDR for dates:

- Include short, long and full templates from CLDR as part of the extraction task to combine time and date formats correctly
  based on http://unicode.org/reports/tr35/tr35-dates.html#availableFormats_appendItems

- Diverge from spec becuase of bug #58 in ECMA 402 to requested options can overrule best match format as described here:
  tc39/ecma402#58

- Refactor the whole CLDR script to complain with the algo described here:
  http://unicode.org/reports/tr35/tr35-dates.html#availableFormats_appendItems

Author: caridy