added in-app help

MediaBrowser.Server.Implementations/Library/UserManager.cs

@@ -498,7 +498,7 @@ namespace MediaBrowser.Server.Implementations.Library
 
             if (!IsValidUsername(name))
             {
-                throw new ArgumentException("Only alphanumeric characters are allowed.");
+                throw new ArgumentException("Usernames can contain letters (a-z), numbers (0-9), dashes (-), underscores (_), apostrophes ('), and periods (.)");
             }
 
             if (Users.Any(u => u.Name.Equals(name, StringComparison.OrdinalIgnoreCase)))

MediaBrowser.Server.Implementations/Localization/JavaScript/javascript.json

@@ -40,6 +40,7 @@
     "LabelStopping": "Stopping",
     "LabelCancelled": "(cancelled)",
     "LabelFailed": "(failed)",
+    "ButtonHelp": "Help",
     "LabelAbortedByServerShutdown": "(Aborted by server shutdown)",
     "LabelScheduledTaskLastRan": "Last ran {0}, taking {1}.",
     "HeaderDeleteTaskTrigger": "Delete Task Trigger",

MediaBrowser.Server.Implementations/MediaBrowser.Server.Implementations.csproj

@@ -51,7 +51,7 @@
     </Reference>
     <Reference Include="MediaBrowser.Naming, Version=1.0.0.0, Culture=neutral, processorArchitecture=MSIL">
       <SpecificVersion>False</SpecificVersion>
-      <HintPath>..\packages\MediaBrowser.Naming.1.0.0.21\lib\portable-net45+sl4+wp71+win8+wpa81\MediaBrowser.Naming.dll</HintPath>
+      <HintPath>..\packages\MediaBrowser.Naming.1.0.0.22\lib\portable-net45+sl4+wp71+win8+wpa81\MediaBrowser.Naming.dll</HintPath>
     </Reference>
     <Reference Include="Mono.Nat, Version=1.2.21.0, Culture=neutral, processorArchitecture=MSIL">
       <SpecificVersion>False</SpecificVersion>