[Wtp-wst-dev] Dates Times..and Duration fixes

[David Carver <d_a_carver@xxxxxxxxx>]

I've got all but two of the Date specific tests passing, and those two 
seem to be precision errors.  Much of the way the dates have been stored 
and calculated has undergone some changes.  Also, the 
fn:adjuest-dateTime-to-timzeone related functions are all now passing 
[280547, 280548, 280549] as well.  This has allowed several implicit 
timzeone function tests to pass as well.  

Current stats are now:

Total Tests: 8137
Failures: 181
Errors: 2

Code coverage is hovering around 74%, and we have a 97.7% passing rate 
for the XPath 2.0 test suite.  All code is checked into head.

Dave