[Mpi3-ft] Quiescence Interface

[Josh Hursey]

I have updated the Quiescence Interface proposal on the wiki:
   https://svn.mpi-forum.org/trac/mpi-forum-web/wiki/Quiescence

I am interested in questions and comments from the group regarding the  
interface, and use-cases. The primary use-case is for application  
initiated checkpoint/restart, but the semantics of the proposed API  
likely also open doors to other use-cases.

Let me know what you think.

Cheers,
Josh