fix ms-build props

Author: oldrev

GeographicLib/Directory.Build.props

@@ -3,7 +3,7 @@
   <PropertyGroup>
     <PackageId>Sandwych.GeographicLib</PackageId>
     <Title>This is an attempt to port the Java version of GeographicLib to C#.</Title>
-    <PackageTags>geographic;gis</PackageTags>
+    <PackageTags>geographic;gis;geodesic;gnomonic;</PackageTags>
     <VersionPrefix>1.0.49</VersionPrefix>
   </PropertyGroup>
 

Shared.props

@@ -1,14 +1,11 @@
 <Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
 
   <PropertyGroup>
-    <Copyright>
-        Copyright (c) 2008-2013, Charles Karney.
-        Copyright (c) 2017 Li "oldrev" Wei.
-    </Copyright>
+    <Copyright>Copyright (c) 2008-2013, Charles Karney. Copyright (c) 2017 Li "oldrev" Wei.</Copyright>
     <Authors>Wei "oldrev" Li</Authors>
     <PackageProjectUrl>https://github.com/oldrev/GeographicLib</PackageProjectUrl>
     <PackageLicenseUrl>https://github.com/oldrev/GeographicLib/blob/master/LICENSE.md</PackageLicenseUrl>
-    <TargetFrameworks>netstandard1.3;net461</TargetFrameworks>
+    <TargetFrameworks>netstandard1.1</TargetFrameworks>
     <VersionSuffix Condition="'$(VersionSuffix)'!='' AND '$(BuildNumber)' != ''">$(VersionSuffix)-$(BuildNumber)</VersionSuffix>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
     <DebugType>portable</DebugType>