Add Version upgrade 3.3 to 3.4

Need to distinguish between quality and quality_changes in the cura directory,
so we need to move all custom quality profiles into the quality_changes directory.

plugins/VersionUpgrade/VersionUpgrade33to34/__init__.py

@@ -0,0 +1,35 @@
+# Copyright (c) 2018 Ultimaker B.V.
+# Cura is released under the terms of the LGPLv3 or higher.
+
+from . import VersionUpgrade33to34
+
+upgrade = VersionUpgrade33to34.VersionUpgrade33to34()
+
+
+def getMetaData():
+    return {
+        "version_upgrade": {
+            # From                           To                              Upgrade function
+            ("definition_changes", 3000004): ("definition_changes", 4000004, upgrade.upgradeInstanceContainer),
+            ("quality_changes", 3000004):    ("quality_changes", 4000004,    upgrade.upgradeInstanceContainer),
+            ("user", 3000004):               ("user", 4000004,               upgrade.upgradeInstanceContainer),
+        },
+        "sources": {
+            "definition_changes": {
+                "get_version": upgrade.getCfgVersion,
+                "location": {"./definition_changes"}
+            },
+            "quality_changes": {
+                "get_version": upgrade.getCfgVersion,
+                "location": {"./quality"}
+            },
+            "user": {
+                "get_version": upgrade.getCfgVersion,
+                "location": {"./user"}
+            }
+        }
+    }
+
+
+def register(app):
+    return { "version_upgrade": upgrade }