Fix issue with yesod-core > 1.4.13.

yesod-core-1.4.14 changed the Template Haskell behind the expansion of
mkYesodData, such that it now must have the application data type
declared before it is called.  This change simply moves the call to
mkYesodData to be after the data type it wants to access is declared.

https://github.com/yesodweb/yesod/issues/1059 has some discussion of the
issue from the Yesod side.

Assistant/WebApp/Types.hs

@@ -36,8 +36,6 @@ publicFiles "static"
 staticRoutes :: Static
 staticRoutes = $(embed "static")
 
-mkYesodData "WebApp" $(parseRoutesFile "Assistant/WebApp/routes")
-
 data WebApp = WebApp
 	{ assistantData :: AssistantData
 	, authToken :: AuthToken
@@ -49,6 +47,8 @@ data WebApp = WebApp
 	, listenHost ::Maybe HostName
 	}
 
+mkYesodData "WebApp" $(parseRoutesFile "Assistant/WebApp/routes")
+
 instance Yesod WebApp where
 	{- Require an auth token be set when accessing any (non-static) route -}
 	isAuthorized _ _ = checkAuthToken authToken