Added appveyor build script
Added appveyor build script

pergerch/DotSpatial,swsglobal/DotSpatial,swsglobal/DotSpatial,JasminMarinelli/DotSpatial,bdgza/DotSpatial,donogst/DotSpatial,pedwik/DotSpatial,swsglobal/DotSpatial,JasminMarinelli/DotSpatial,DotSpatial/DotSpatial,CGX-GROUP/DotSpatial,bdgza/DotSpatial,donogst/DotSpatial,JasminMarinelli/DotSpatial,pedwik/DotSpatial,donogst/DotSpatial,CGX-GROUP/DotSpatial,pergerch/DotSpatial,pedwik/DotSpatial,CGX-GROUP/DotSpatial,pergerch/DotSpatial,DotSpatial/DotSpatial,bdgza/DotSpatial,DotSpatial/DotSpatial