prepare develop branch for next version

Doxyfile

@@ -33,7 +33,7 @@ PROJECT_NAME           = "websocketpp"
 # if some version control system is used.
 
 
-PROJECT_NUMBER         = "0.5.0"
+PROJECT_NUMBER         = "0.5.x-dev"
 
 
 # Using the PROJECT_BRIEF tag one can provide an optional one line description

readme.md

@@ -1,4 +1,4 @@
-WebSocket++ (0.5.0)
+WebSocket++ (0.5.x-dev)
 ==========================
 
 WebSocket++ is a header only C++ library that implements RFC6455 The WebSocket

websocketpp/version.hpp

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2014, Peter Thorson. All rights reserved.
+ * Copyright (c) 2015, Peter Thorson. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
@@ -50,10 +50,10 @@ static int const patch_version = 0;
  * This is a textual flag indicating the type and number for pre-release
  * versions (dev, alpha, beta, rc). This will be blank for release versions.
  */
-static char const prerelease_flag[] = "";
+static char const prerelease_flag[] = "dev";
 
 /// Default user agent string
-static char const user_agent[] = "WebSocket++/0.5.0";
+static char const user_agent[] = "WebSocket++/0.5.x-dev";
 
 } // namespace websocketpp