[security-services] First draft of SAML FAQ: needs review/contentbig-time!

This draft has all of the questions contributed by Edwin (and more), and 
*some* of the answers contributed by Hal; I didn't have time to incorporate 
all of them in a "pretty" fashion.  I'll try to work on incorporating more 
answers while I'm on the road in the next couple of weeks, but would like 
to get a public draft of the FAQ out soon (perhaps just removing the 
questions that don't have answers yet? what do people think?).

Thanks,

	Eve