fix #273 - GetBoneSafe doesn't accept StringHash

.gitignore

@@ -37,3 +37,5 @@ clang+llvm-3.7.0-x86_64-apple-darwin*
 project.lock.json
 /ProjectTemplates/SharpRealityVsix/ProjectTemplates
 /ProjectTemplates/VSIX/ProjectTemplates
+/Tests/Playgrounds/Playgrounds.NetCoreApp/CoreData.pak
+/Tests/Playgrounds/Playgrounds.NetCoreApp/Urho3D.log

Bindings/Portable/Skeleton.cs

@@ -8,7 +8,8 @@ namespace Urho {
 	// have dangling pointers, we only surface the constructor that retains a copy
 	// to the container
 	
-	public partial class Skeleton {
+	public partial class Skeleton 
+	{
 		IntPtr handle;
 
 		[Preserve]
@@ -29,17 +30,19 @@ namespace Urho {
 			}
 		}
 
-		public BoneWrapper GetBoneSafe(String name)
+		public BoneWrapper GetBoneSafe(StringHash nameHash)
 		{
 			Runtime.ValidateObject(this);
 			unsafe
 			{
-				Bone* result = Skeleton_GetBone0(handle, new StringHash(name).Code);
+				Bone* result = Skeleton_GetBone0(handle, nameHash.Code);
 				if (result == null)
 					return null;
 				return new BoneWrapper(this, result);
 			}
 		}
+
+		public BoneWrapper GetBoneSafe(string name) => GetBoneSafe(new StringHash(name));
 	}
 
 	public partial class AnimatedModel {

Tests/Playgrounds/Playgrounds.NetCoreApp/Program.cs

@@ -9,6 +9,7 @@ namespace Playgrounds.NetCoreApp
 	{
 		static void Main(string[] args)
 		{
+			throw new NotImplementedException("Not fully implemented yet, requires changes in Urho3D (FileSystem)");
 			Console.WriteLine("Dir: " + Environment.CurrentDirectory);
 			// the current directory is not "bin" ?? https://github.com/dotnet/project-system/issues/589
 			// workaround: