- replaced the testing if instance of FlatCAMObj with testing the obj.kind attribute

- removed the import of the whole FlatCAMApp file only for the usage of GracefulException
- remove the import of FlatCAMApp and used alternate ways
- optimized the imports in some files
- moved the Bookmarksmanager and ToolDB classes into their own files
- solved some bugs that were not so visible in the Editors and HPGL parser
- split the FlatCAMObj file into multiple files located in the flatcamObjects folder and renamed the contained classes with names more suggestive
- updated the Google Translation for the German language

tclCommands/TclCommandAlignDrill.py

@@ -1,6 +1,5 @@
 import collections
 from tclCommands.TclCommand import TclCommandSignaled
-from FlatCAMObj import FlatCAMGeometry, FlatCAMGerber, FlatCAMExcellon
 
 from shapely.geometry import Point
 import shapely.affinity as affinity
@@ -89,9 +88,7 @@ class TclCommandAlignDrill(TclCommandSignaled):
         if obj is None:
             return "Object not found: %s" % name
 
-        if not isinstance(obj, FlatCAMGeometry) and \
-                not isinstance(obj, FlatCAMGerber) and \
-                not isinstance(obj, FlatCAMExcellon):
+        if obj.kind != "geometry" and obj.kind != 'gerber' and obj.kind != 'excellon':
             return "ERROR: Only Gerber, Geometry and Excellon objects can be used."
 
         # Axis