Merged accumulated patches from Trunk.

[SVN r62831]

example/Jamfile.v2

@@ -10,9 +10,12 @@ project
       # There are unidentified linker problems on these platforms:
       <toolset>mipspro-7.4:<link>static
       <toolset>sun-5.9:<link>static
+      <toolset>msvc:<warnings>all
+      <toolset>gcc:<warnings>all
+      <toolset>gcc:<cxxflags>-Wextra
+      <define>U_USING_ICU_NAMESPACE=0
     ;
 
-
 rule regex-test-run ( sources + : input * : name * )
 {
         return [