CURA-4552 Add flavors to GCodeReader. The preRead looks for the flavor

in the GCode and then the right flavor handler is responsible for
reading the code. At this moment just the Griffin and RepRap flavors are
taken into account.

plugins/GCodeReader/GriffinFlavor.py

@@ -0,0 +1,9 @@
+# Copyright (c) 2017 Ultimaker B.V.
+# Cura is released under the terms of the LGPLv3 or higher.
+
+from . import GCodeFlavor
+
+class GriffinFlavor(GCodeFlavor.GCodeFlavor):
+
+    def __init__(self):
+        super().__init__()