GLib is already doing this, which broke a number of auto-generated code.
This tracks those changes and manually sets the annotations so that we
are guaranteed to get this behavior.
We'll need to fix other uses (such as in Mutter), but we have to do that
already because of the change in GLib.
Fixes#17
This is useful for optimized parsing of proc files such as necessary by
the memory source to seek() back to the start (instead of re-opening a
new file).
Calling all the individual function calls to get process information would
be considerably inefficient, so we can coalesce a bunch of that and change
our process-model implementation (and proc source) to use this.
