untested MSVC toolset

untested response-file support
expanded optimization to speed/space/off

removed module_actions.PYC
validate multiple properties at once.
Fix bugs in type.jam, virtual-target.jam, symlink.py


[SVN r17487]

tools/build

@@ -1 +1 @@
-Subproject commit 5d0f3e119aac3e2b7d3208a6da8f48482ff240d5
+Subproject commit 991f2ecde2f5352348e114c55163509a4874657c