Unordered: Merge some of the older changes from trunk.

Code reorganization, simpler tests, better use of Boost.Move.


[SVN r79545]

test/unordered/Jamfile.v2

@@ -15,9 +15,6 @@ project unordered-test/unordered
         <toolset>darwin:<cxxflags>"-pedantic -Wstrict-aliasing -fstrict-aliasing -Wextra -Wsign-promo -Wunused-parameter -Wconversion -Wfloat-equal"
         #<toolset>gcc:<define>_GLIBCXX_DEBUG
         #<toolset>darwin:<define>_GLIBCXX_DEBUG
-        #<toolset>msvc:<warnings-as-errors>on
-        <toolset>gcc:<warnings-as-errors>on
-        <toolset>darwin:<warnings-as-errors>on
     ;
 
 test-suite unordered