CURA-4552 Change names as indicated in the review and making Marlin the

default flavor. Also fix the case in which the read flavor was not in
the dict.

plugins/GCodeReader/MarlinFlavorParser.py

@@ -0,0 +1,10 @@
+# Copyright (c) 2017 Ultimaker B.V.
+# Cura is released under the terms of the LGPLv3 or higher.
+
+from . import FlavorParser
+
+# This parser is intented for interpret the Marlin/Sprinter Firmware flavor
+class MarlinFlavorParser(FlavorParser.FlavorParser):
+
+    def __init__(self):
+        super().__init__()