i haven't uploaded the code yet but will do soon.
regarding multiplatform libraries, right now the plugins and the project generator are able to parse the visual studio folder layout with platform/target as it's done with opencv. i think in visual studio the order in which libraries are included is not imprtant as with gcc so it's not so necesary to include them in the addons_config.mk, just put them in the correct folders and they'll get included.
in any case i was planning to add support in addon_config.mk for different architectures and targets probably like:
vsWin32Debug:
ADDON_LIBS += ...
vsx64Release
ADDON_LIBS += ...
having the option to also add a visual studio project if it's present in the addon would be great too since it would really be the most flexible and robust but i think most people won't generate such projects for their addons so having support for parsing the filesystem and addons_config is the easiest for most addons mantainers since most addons can just be used without adding any metadata or project file at all