Update VS Solution Files

[TheEgghead27]

Added waypointai.cpp and minimap.cpp to the vcxproj so the solution will have access to and compile all currently recent source files. This resolves #43

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[no-lex]

I'd merge this, except that the commit also rolls back libprimis-headers. This should be fixable with

git reset --soft HEAD~
git reset libprimis-headers/
git commit -m "Update VS Solution Files"
git push -f 

Thanks!

[TheEgghead27]

Alright, applied those changes.