Merge latest unordered developments:

Make simple_test test a little more.
Use doubles for calculating max load factor.
Some workarounds, mostly for Borland and running the tests.


[SVN r42666]

test/unordered/rehash_tests.cpp

@@ -12,7 +12,7 @@
 test::seed_t seed(2974);
 
 template <class X>
-bool postcondition(X const& x, typename X::size_type n)
+bool postcondition(X const& x, BOOST_DEDUCED_TYPENAME X::size_type n)
 {
     return x.bucket_count() > x.size() / x.max_load_factor() && x.bucket_count() >= n;
 }