Setup MSVC compiler version from VS version.
Setup MSVC compiler version from VS version.

Should help fix the compile errors with VS 2015 from issue #556.

ddobrev/CppSharp,inordertotest/CppSharp,ktopouzi/CppSharp,ddobrev/CppSharp,mohtamohit/CppSharp,genuinelucifer/CppSharp,mono/CppSharp,zillemarco/CppSharp,mohtamohit/CppSharp,ktopouzi/CppSharp,SonyaSa/CppSharp,mohtamohit/CppSharp,mydogisbox/CppSharp,ddobrev/CppSharp,u255436/CppSharp,inordertotest/CppSharp,genuinelucifer/CppSharp,mono/CppSharp,SonyaSa/CppSharp,inordertotest/CppSharp,mohtamohit/CppSharp,mono/CppSharp,ktopouzi/CppSharp,mydogisbox/CppSharp,SonyaSa/CppSharp,ktopouzi/CppSharp,zillemarco/CppSharp,mydogisbox/CppSharp,inordertotest/CppSharp,genuinelucifer/CppSharp,genuinelucifer/CppSharp,mono/CppSharp,u255436/CppSharp,mono/CppSharp,mono/CppSharp,zillemarco/CppSharp,mydogisbox/CppSharp,ddobrev/CppSharp,ddobrev/CppSharp,u255436/CppSharp,genuinelucifer/CppSharp,mydogisbox/CppSharp,SonyaSa/CppSharp,SonyaSa/CppSharp,mohtamohit/CppSharp,u255436/CppSharp,inordertotest/CppSharp,ktopouzi/CppSharp,u255436/CppSharp,zillemarco/CppSharp,zillemarco/CppSharp