Added appveyor build test script
Added appveyor build test script

GyreTechnologies/piranha.core,PiranhaCMS/piranha.core,GyreTechnologies/piranha.core,filipjansson/piranha.core,PiranhaCMS/piranha.core,filipjansson/piranha.core,PiranhaCMS/piranha.core,filipjansson/piranha.core,PiranhaCMS/piranha.core,GyreTechnologies/piranha.core