Fix typo: forgrounds -> foregrounds.
Fix all-gtype-instances initialization

- Lazily initialize it
- GObject has GTypeInstance as a parent
Remove gdkpixbuf jam file and undefined functions in gio
Declare <GTypeInstance> as an open C-subtype
configure: add support for multiarch layout in libgc search
io: fixed some missing stream locks
io: add some assertions for stream locking
io: added a force-out function next to format-out
Merge pull request #520 from promovicz/add-force-out

io: added a force-out function next to format-out
Merge pull request #518 from promovicz/fix-multiarch-configure

configure: add support for multiarch layout in libgc search
Merge pull request #519 from promovicz/fix-stream-locking

Fix some missing stream locking
Release note updates.
Bug 7458: Implement closure support for dfmc-llvm-back-end

Implement the <make-closure> and <initialize-closure> computation
emitters in dfmc-llvm-back-end, and support retrieving closure
variable references.

* sources/dfmc/llvm-back-end/llvm-emit-code.dylan
  (emit-code): Bind *current-environment* during IEP code emission as
   the other back-ends do.  Mark closure method objects as read-only
   to enable common subexpression elimination.

* sources/dfmc/llvm-back-end/llvm-emit-computation.dylan
  (emit-reference on <temporary>): Check for closure references and
   implement using a call to emit-closure-reference.
  (emit-closure-reference): New function to implement closure references.
  (emit-computation on <make-closure>): Change to implement the various
   cases (stack-allocated closure, top-level method with dynamic signature,
   initialized or uninitialized closure with or without dynamic signature,
   local non-closure method with a dynamic signature).
  (emit-computation on <initialize-closure>): Fill in to implement closure
   initialization.

* sources/dfmc/llvm-back-end/llvm-primitives-lambda.dylan
  (op--init-signature): New auxiliary emitter method for initializing
   the signature field of a method.
  (op--make-method-with-signature): New auxiliary emitter method for
   allocating a new local non-closure method with a dynamic signature.
  (primitive primitive-make-keyword-method-with-signature,
   primitive primitive-make-method-with-signature): New runtime primitives.
  (op--make-closure): New utility emitter method for allocating a new closure
   method object.
  (primitive primitive-make-keyword-closure,
   primitive primitive-make-closure,
   primitive primitive-make-keyword-closure-signature,
   primitive primitive-make-closure-signature): New runtime primitives.
  (op--init-closure-environment): New auxiliary emitter method for
   initializing closure environment slots based on varargs passed to
   the runtime primitive.
  (primitive primitive-make-keyword-closure-with-environment,
   primitive primitive-make-closure-with-environment,
   primitive-make-keyword-closure-with-environment-signature,
   primitive-make-closure-with-environment-signature): New runtime primitives.
  (primitive primitive-initialize-keyword-closure,
   primitive primitive-initialize-closure): New runtime primitives.
  (op--stack-allocate-closure): New auxiliary emitter method for allocating
   a closure method object on the stack.

* sources/dfmc/llvm-back-end/llvm-primitives-alloc.dylan
  (primitive-copy-r): New C primitive definition.
Remove dfmc-projects and projects-protocol.

These aren't used, don't work and the original author suggested
that we start over rather than use this.

It is also difficult to update code that we don't run or even build
for changes happening to projects and seeing this code in grep
output is always confusing.
Change return type of g-object-ref-sink to <C-void*>

This was causing an infinite loop in make.
Update Gtk+ libraries

This update:

- fixes object properties
- improves names of slots and variables
Merge pull request #523 from fracek/glue-fixes

Glue fixes
Merge pull request #522 from waywardmonkeys/remove-dfmc-projects

Remove dfmc-projects and projects-protocol.
Fix typo: tempation -> temptation.
Define gobject-glue as a module of gobject