Introduce blanco LegacySettings plugin

This plugin will be implemented to import settings from legacy versions of Cura.

Contributes to issue CURA-37.

plugins/LegacySettings/LegacySettings.py

@@ -0,0 +1,8 @@
+# Copyright (c) 2015 Ultimaker B.V.
+# Cura is released under the terms of the AGPLv3 or higher.
+
+from UM.Extension import Extension
+
+class LegacySettings(Extension):
+    def __init__(self):
+        super().__init__()

plugins/LegacySettings/__init__.py

@@ -0,0 +1,21 @@
+# Copyright (c) 2015 Ultimaker B.V.
+# Cura is released under the terms of the AGPLv3 or higher.
+
+from . import LegacySettings
+
+from UM.i18n import i18nCatalog
+catalog = i18nCatalog("cura")
+
+def getMetaData():
+    return {
+        "plugin": {
+            "name": catalog.i18nc("@label", "GCode Reader"),
+            "author": "Ultimaker",
+            "version": "1.0",
+            "description": catalog.i18nc("@info:whatsthis", "Provides support for reading GCode files."),
+            "api": 2
+        }
+    }
+
+def register(app):
+    return { "extension": LegacySettings.LegacySettings() }