Draft: add modules of draftobjects to the proper Doxygen group

This includes `array`, `base`, `bezcurve`, `block`, `bspline`,
`circle`, `clone`, `dimension`, `draft_annotation`, `draftlink`,
`drawingview`, `ellipse`, `facebinder`, `fillet`, `label`,
`patharray`, `point`, `pointarray`, `polygon`, `rectangle`,
`shape2dview`, `shapestring`, `text`, `wire`, `wwproxy`.

These are added to the `draftobjects` Doxygen group
so that the functions and classes contained in each module
are listed appropriately in the automatically generated
documentation.

src/Mod/Draft/draftobjects/draftlink.py

@@ -18,7 +18,7 @@
 # *   USA                                                                   *
 # *                                                                         *
 # ***************************************************************************
-"""Provides the object code for the Draft Link object.
+"""Provides the base class for Link objects used by other objects.
 
 This class was created by realthunder during the `LinkMerge`
 to demonstrate how to use the `App::Link` objects to create
@@ -31,8 +31,8 @@ on how the properties are being set, and how the code interacts with
 the arrays that use it.
 """
 ## @package draftlink
-# \ingroup DRAFT
-# \brief Provides the object code for the Draft Link object.
+# \ingroup draftobjects
+# \brief Provides the base class for Link objects used by other objects.
 
 import lazy_loader.lazy_loader as lz
 from PySide.QtCore import QT_TRANSLATE_NOOP
@@ -46,6 +46,9 @@ from draftobjects.base import DraftObject
 Part = lz.LazyLoader("Part", globals(), "Part")
 DraftGeomUtils = lz.LazyLoader("DraftGeomUtils", globals(), "DraftGeomUtils")
 
+## \addtogroup draftobjects
+# @{
+
 
 class DraftLink(DraftObject):
     """New class to use the App::Link objects in arrays.
@@ -224,3 +227,5 @@ class DraftLink(DraftObject):
 
 # Alias for compatibility with old versions of v0.19
 _DraftLink = DraftLink
+
+## @}