NJRDateFormatter.m: Remove an unused function; actually get ICU-based date formatters working (previously, only Date::Manip was in use); add additional date formatters; resolve issue with "a" and "p" (or localized equivalents) not being interpreted as expected.
NJRDateFormatter.m: Remove an unused function; actually get ICU-based date formatters working (previously, only Date::Manip was in use); add additional date formatters; resolve issue with "a" and "p" (or localized equivalents) not being interpreted as expected.

git-svn-id: eb9cabd5e2eadbda83dd6bb0ac669675a4cc7c38@577 24bc951d-4bb6-0310-a7b7-f2527510289e

nriley/Pester,ssp/Pester,ssp/Pester,ssp/Pester,ssp/Pester,ssp/Pester,nriley/Pester