Update the gyp file to account for recent file renamings and refactoring.
Update the gyp file to account for recent file renamings and refactoring.

Also add agent/EventLoop.h.  I don't know why it wasn't listed.

With these changes, gyp no longer complains about missing files.
Unfortunately I can't do more testing at the moment.

This commit might fix issue https://github.com/rprichard/winpty/issues/55.

rprichard/winpty,fracting/winpty,fracting/winpty,rprichard/winpty,fracting/winpty,fracting/winpty,rprichard/winpty,rprichard/winpty