fix: Addressing an API consistency issue

Fixes #47

Author: Turner, Dan

README.md

@@ -114,7 +114,7 @@ Each area has its own list of methods available
 
 	void SetBuildTypeTemplate(BuildTypeLocator locatorBuildType, BuildTypeLocator locatorTemplate);
 	void DeleteSnapshotDependency(BuildTypeLocator locator, string snapshotDependencyId);
-	void PostRawSnapshotDependency(BuildTypeLocator locator, XmlElement rawXml);
+	void PostRawSnapshotDependency(BuildTypeLocator locator, string rawXml);
 	BuildConfig BuildType(BuildTypeLocator locator);
 
     void DeleteConfiguration(BuildTypeLocator locator);

src/TeamCitySharp/ActionTypes/BuildConfigs.cs

@@ -198,9 +198,9 @@ public void DeleteSnapshotDependency(BuildTypeLocator locator, string snapshotDe
             _caller.DeleteFormat("/app/rest/buildTypes/{0}/snapshot-dependencies/{1}", locator, snapshotDependencyId);
         }
 
-        public void PostRawSnapshotDependency(BuildTypeLocator locator, XmlElement rawXml)
+        public void PostRawSnapshotDependency(BuildTypeLocator locator, string rawXml)
         {
-            _caller.PostFormat(rawXml.OuterXml, HttpContentTypes.ApplicationXml, "/app/rest/buildTypes/{0}/snapshot-dependencies", locator);
+            _caller.PostFormat(rawXml, HttpContentTypes.ApplicationXml, "/app/rest/buildTypes/{0}/snapshot-dependencies", locator);
         }
 
         public BuildConfig BuildType(BuildTypeLocator locator)

src/TeamCitySharp/ActionTypes/IBuildConfigs.cs

@@ -61,7 +61,7 @@ public interface IBuildConfigs
         ///    </snapshot-dependency>
         /// ]]></code>
         /// </summary>
-        void PostRawSnapshotDependency(BuildTypeLocator locator, XmlElement rawXml);
+        void PostRawSnapshotDependency(BuildTypeLocator locator, string rawXml);
 
         /// <summary>
         /// <para>Locates a build type by its locator.</para>