Fixes for tickets #2095 ("pool fails to compile with -fno-exceptions")

and #2359 ("Static initialization problems with
fast_pool_allocator"). Use boost::throw_exception. Explicitly
reference singleton_pool from allocator constructors to avoid troubles
due to unordered initializaiton of static data in class templates.



[SVN r49025]

libs/pool

@@ -1 +1 @@
-Subproject commit 7f87d3e79b7f3adcc3d2e4a7eb68be4a83d9f60e
+Subproject commit 2ab6479e1e0fb42cef8fc0397d3c7e893021fad9