Arch: Added Equipment tool

The purpose of this tool is to handle standalone objects such as
furniture or sanitary equipment in a building. It is mesh-based,
and accepts either a mesh or a part shape as its base object.

src/Mod/Arch/Arch.py

@@ -44,4 +44,5 @@ from ArchSpace import *
 from ArchStairs import *
 from ArchRebar import *
 from ArchFrame import *
-from ArchPanel import *
+from ArchPanel import *
+from ArchEquipment import *