Version bump to 3.0

I want to make some breaking changes, so doing a major bump.

windows/input.py

@@ -1,5 +1,5 @@
 # Relational
-# Copyright (C) 2008-2016  Salvo "LtWorf" Tomaselli
+# Copyright (C) 2008-2020  Salvo "LtWorf" Tomaselli
 #
 # Relational is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -53,5 +53,5 @@ setup(
         }
     ],
     name="Relational",
-    version="2.6",
+    version="3.0",
 )

windows/ss.iss

@@ -7,7 +7,7 @@
 ; (To generate a new GUID, click Tools | Generate GUID inside the IDE.)
 AppId={{6F127615-6AD4-4BD7-8135-2444A335B5CD}
 AppName=Relational
-AppVerName=Relational ver. 2.6
+AppVerName=Relational ver. 3.0
 AppPublisher=Salvo 'LtWorf' Tomaselli
 AppPublisherURL=http://ltworf.github.io/relational/
 AppSupportURL=http://ltworf.github.io/relational/