Update documentation for headless apps: headlessservice, headlessservice...

Hi Eduardo,

These changes are on behalf of Shadid Haque (shaque@blackberry.com).  Adam is away on vacation until Monday, October 14.  There is apparently some urgency to have the headless samples available.  I will copy you on the e-mail thread I have.

Kind regards, John A Hodgson (johodgson@blackberry.com).