Git pull complete

I’ve successfully pulled in changes from Shri, Jimmy, Ivan and myself,
with a couple modifications.

I’ve reverted Ivan’s change to FileOps.cs since it caused tests to fail
across the board.
Jimmy reverted my deletion of builtin tests due to a dependency on them
from SL. The files are there, but they are not running in desktop tests
I’ve also integrated Pascal’s Thread#priority and #priority= changes,
that should unblock Alex on the DO and DataMapper stuff.