boost::signals has been deprecated as of 1.54.0. This patch ports the vapor library from boost::signals to boost::signals2. Submitted by Kevin Godby.
Replace RSA MD5 with libmd5-rfc, which contains no RSA code. This is a cherry-pick merge from the rpavlik switch-md5-impl-master branch. I had to manually apply the vc10/VPR/VPR.vcproj patch to the vc10/VPR/VPR.vcxproj because the current master does not have *.vcproj files. Submitted by Ryan Pavlik.
This patch corrects build issues when using the build_windows.py file with the UI showing in non-interactice mode.