Allow host base URI as an argument to ctor

Also cleaned up some compiler warnings.

ClientLibrary/LUISClientLibrary.nuspec

@@ -11,11 +11,11 @@
     <iconUrl>https://www.luis.ai/Content/images/luis_darker_logo.png</iconUrl>
     <requireLicenseAcceptance>true</requireLicenseAcceptance>
     <description>$description$</description>
-    <releaseNotes>Initial release.</releaseNotes>
-    <copyright>Copyright (c) 2015</copyright>
+    <releaseNotes>User-configurable hostname.</releaseNotes>
+    <copyright>Copyright (c) 2016</copyright>
     <tags>Microsoft Cognitive Services LUIS</tags>
     <dependencies>
     	<dependency id="Newtonsoft.Json" version="9.0.1" />
     </dependencies>
   </metadata>
-</package>
+</package>

ClientLibrary/LuisClient.cs

@@ -46,6 +46,8 @@ namespace Microsoft.Cognitive.LUIS
     /// </summary>
     public class LuisClient : IDisposable
     {
+        private const string DEFAULT_BASE_URI = "https://api.projectoxford.ai/luis/v1/application";
+
         /// <summary>
         /// flag to indidicate whether to return full result of all intents not just the top scoring intent (for preview features only)
         /// </summary>
@@ -90,20 +92,31 @@ namespace Microsoft.Cognitive.LUIS
         }
 
         /// <summary>
-        ///Construct a new Luis client with a shared <see cref="HttpClient"/> instance.
+        /// Construct a new Luis client with a shared <see cref="HttpClient"/> instance.
         /// </summary>
         /// <param name="appId">The application ID of the LUIS application</param>
         /// <param name="appKey">The application subscription key of the LUIS application</param>
         /// <param name="preview">A flag indicating whether to use preview features or not (Dialogue)</param>
         /// top scoring in case of using the dialogue</param>
-        public LuisClient(string appId, string appKey, bool preview = false)
+        public LuisClient(string appId, string appKey, bool preview = false) : this(appId, appKey, DEFAULT_BASE_URI, preview) { }
+
+        /// <summary>
+        /// Construct a new Luis client with a shared <see cref="HttpClient"/> instance.
+        /// </summary>
+        /// <param name="appId">The application ID of the LUIS application</param>
+        /// <param name="appKey">The application subscription key of the LUIS application</param>
+        /// <param name="baseApiUrl">Root URI for the service endpoint.</param>
+        /// <param name="preview">A flag indicating whether to use preview features or not (Dialogue)</param>
+        /// top scoring in case of using the dialogue</param>
+        public LuisClient(string appId, string appKey, string baseApiUrl, bool preview = false)
         {
             if (String.IsNullOrWhiteSpace(appId)) throw new ArgumentException(nameof(appId));
             if (String.IsNullOrWhiteSpace(appKey)) throw new ArgumentException(nameof(appKey));
+            if (String.IsNullOrWhiteSpace(baseApiUrl)) throw new ArgumentException(nameof(baseApiUrl));
 
             HttpClient httpClient = new HttpClient();
             httpClient.DefaultRequestHeaders.Add("OCP-APIM-Subscription-Key", appKey);
-            BASE_API_URL = "https://api.projectoxford.ai/luis/v1/application";
+            BASE_API_URL = baseApiUrl;
 
             Preview = preview;
             _appId = appId;

ClientLibrary/Properties/AssemblyInfo.cs

@@ -7,7 +7,7 @@ using System.Runtime.InteropServices;
 // set of attributes. Change these attribute values to modify the information
 // associated with an assembly.
 [assembly: AssemblyTitle("Microsoft.Cognitive.LUIS")]
-[assembly: AssemblyDescription("Microsoft.Cognitive.LUIS")]
+[assembly: AssemblyDescription("Microsoft Cognitive Services LUIS Client Library")]
 [assembly: AssemblyCompany("Microsoft")]
 [assembly: AssemblyProduct("Microsoft Cognitive Services")]
 [assembly: AssemblyCopyright("Copyright © 2016 Microsoft")]

ClientLibrary/Structures/CompositeEntity.cs

@@ -70,7 +70,7 @@ namespace Microsoft.Cognitive.LUIS
                 var values = (JArray)compositeEntity["children"] ?? new JArray();
                 CompositeEntityChildren = ParseValuesArray(values);
             }
-            catch (Exception e)
+            catch (Exception)
             {
                 CompositeEntityChildren = null;
             }

ClientLibrary/Structures/Entity.cs

@@ -81,7 +81,7 @@ namespace Microsoft.Cognitive.LUIS
             {
                 Score = (double)entity["score"];
             }
-            catch (Exception e)
+            catch (Exception)
             {
                 Score = -1;
             }

ClientLibrary/Structures/Parameter.cs

@@ -72,7 +72,7 @@ namespace Microsoft.Cognitive.LUIS
                 var values = (JArray)parameter["value"] ?? new JArray();
                 ParameterValues = ParseValuesArray(values);
             }
-            catch (Exception e)
+            catch (Exception)
             {
                 ParameterValues = null;
             }