Capabilities for quantitative resources working.

Status:
- Capability initialization is a bit hacky with dummy current etc.
- All container caps belong to the pager
- Tasks refer to their pager's capabilities for mutex allocation - Hacky.
- Kernel container keeps quantitative caps and memory caps in separate lists - Hacky.

These will all evolve and get fixed.

src/generic/capability.c

@@ -41,8 +41,9 @@ int capability_consume(struct capability *cap, int quantity)
 {
 	if (cap->size < cap->used + quantity)
 		return -ENOCAP;
-	else
-		cap->used += quantity;
+
+	cap->used += quantity;
+
 	return 0;
 }