Added a public SdkDir property to MonoMacSdk (#25)

Author: jstedfast

Xamarin.MacDev/MonoMacSdk.cs

@@ -32,7 +32,9 @@ public sealed class MonoMacSdk : IMonoMacSdk
 	{
 		static DateTime lastExeWrite = DateTime.MinValue;
 
-		string sdkDir;
+		public string SdkDir {
+			get; private set;
+		}
 
 		public string LegacyFrameworkAssembly {
 			get; private set;
@@ -46,7 +48,7 @@ public MonoMacSdk (string defaultLocation, string legacyFrameworkAssembly, strin
 		{
 			LegacyFrameworkAssembly = legacyFrameworkAssembly;
 			LegacyAppLauncherPath = legacyAppLauncherPath;
-			sdkDir = defaultLocation;
+			SdkDir = defaultLocation;
 			Init ();
 		}
 
@@ -70,7 +72,7 @@ void Init ()
 
 		MacOSXSdkVersion ReadVersion ()
 		{
-			var versionFile = Path.Combine (sdkDir, "Version");
+			var versionFile = Path.Combine (SdkDir, "Version");
 			if (File.Exists (versionFile)) {
 				try {
 					return MacOSXSdkVersion.Parse (File.ReadAllText (versionFile).Trim ());