Revision 1209240

QPID-2643 Visual Studio 2010

Try to dodge several issues that appear on 64-bit hosts with both VS2008 and
VS2010 installed at the same time. The new bld-winsdk.ps1 script requires
a user to call an environment setup script before it is run. This lets the
script simply refer to 'devenv' and get the right thing. Note that the
script invocation args and the version of boost must match the version
of the kit being built.