[doc] prevent multiple entries in Sphinx documentation

Some classes and functions of bot module are imported in pywikibot and
can also be used as pywikibot members. Remove the documentation from
pywikibot and add a reference to bot module for them.

Change-Id: Ic9ac9604023828017e15a7854ef71ebecc29091c

docs/api_ref/bot.rst

@@ -6,6 +6,21 @@
    :synopsis: User-interface related functions for building bots
    :member-order: bysource
 
+   .. admonition:: Imports in :mod:`pywikibot` module
+
+      The following classes and functions are inported in :mod:`pywikibot`
+      module and can also be used as :mod:`pywikibot` members:
+
+      - :class:`pywikibot.Bot<bot.Bot>`
+      - :class:`pywikibot.CurrentPageBot<bot.CurrentPageBot>`
+      - :class:`pywikibot.WikidataBot<bot.WikidataBot>`
+      - :func:`pywikibot.calledModuleName<bot.calledModuleName>`
+      - :func:`pywikibot.handle_args<bot.handle_args>`
+      - :func:`pywikibot.input<bot.input>`
+      - :func:`pywikibot.input_choice<bot.input_choice>`
+      - :func:`pywikibot.input_yn<bot.input_yn>`
+      - :func:`pywikibot.show_help<bot.show_help>`
+
    .. autoclass:: BaseBot
 
       .. attribute:: generator

docs/api_ref/pywikibot.rst

@@ -3,3 +3,20 @@
 ***********************************************
 
 .. automodule:: pywikibot
+   :exclude-members: Bot, CurrentPageBot, WikidataBot, calledModuleName, 
+       handle_args, input, input_choice, input_yn, show_help
+
+   .. admonition:: Imports from :mod:`bot` module
+
+      The following classes and functions are inported from :mod:`bot` module
+      but can also be used as :mod:`pywikibot` members:
+
+      - :class:`pywikibot.Bot<bot.Bot>`
+      - :class:`pywikibot.CurrentPageBot<bot.CurrentPageBot>`
+      - :class:`pywikibot.WikidataBot<bot.WikidataBot>`
+      - :func:`pywikibot.calledModuleName<bot.calledModuleName>`
+      - :func:`pywikibot.handle_args<bot.handle_args>`
+      - :func:`pywikibot.input<bot.input>`
+      - :func:`pywikibot.input_choice<bot.input_choice>`
+      - :func:`pywikibot.input_yn<bot.input_yn>`
+      - :func:`pywikibot.show_help<bot.show_help>`