JSR 105 integration done

[Sean Mullan]

Hi all,

I have finished the integration of JSR 105 (Java XML Digital Signature) 
API & Implementation and merged my personal branch to the main/trunk. 
There is a new ant target named "test_jsr105" which will run the new 
unit tests. Eventually I will merge this target with the existing "test" 
target but I wanted to give it a little time to settle first. There are 
a few test failures which need to be analyzed & fixed but the majority 
pass. Please try it out, build it and let me know if you see any problems!

--Sean