Add a pronouns module

If witch-house/pronoun.is#40 gets merged, it's
probably worth porting to use that, since there are a *lot* of pronoun
sets.

Yes, this should probably support other languages. Sopel's i18n is
horrible and I know it.

sopel/modules/pronouns.py

@@ -0,0 +1,85 @@
+# coding=utf-8
+"""
+pronouns.py - Sopel Pronouns Module
+Copyright © 2016, Elsie Powell
+Licensed under the Eiffel Forum License 2.
+
+http://sopel.chat
+"""
+from __future__ import unicode_literals, absolute_import, print_function, division
+
+from sopel.logger import get_logger
+from sopel.module import commands, example
+
+logger = get_logger(__name__)
+# Copied from pronoun.is, leaving a *lot* out. If
+# https://github.com/witch-house/pronoun.is/pull/40 gets merged, using that
+# would be a lot easier.
+KNOWN_SETS = {
+    'ze': 'ze/hir/hir/hirs/hirself',
+    'ze/hir': 'ze/hir/hir/hirs/hirself',
+    'ze/zir': 'ze/zir/zir/zirs/zirself',
+    'they': 'they/them/their/theirs/themselves',
+    'they/.../themselves': 'they/them/their/theirs/themselves',
+    'they/.../themself': 'they/them/their/theirs/themself',
+    'she': 'she/her/her/hers/herself',
+    'he': 'he/him/his/his/himself',
+    'xey': 'xey/xem/xyr/xyrs/xemself',
+    'sie': 'sie/hir/hir/hirs/hirself',
+    'it': 'it/it/its/its/itself',
+    'ey': 'ey/em/eir/eirs/eirslef',
+}
+
+
+@commands('pronouns')
+@example('.pronouns Embolalia')
+def pronouns(bot, trigger):
+    if not trigger.group(2):
+        pronouns = bot.db.get_nick_value(trigger.nick, 'pronouns')
+        if pronouns:
+            say_pronouns(bot, trigger.nick, pronouns)
+        else:
+            bot.reply("I don't know your pronouns! You can set them with "
+                      ".setpronouns")
+    else:
+        pronouns = bot.db.get_nick_value(trigger.group(2), 'pronouns')
+        if pronouns:
+            say_pronouns(bot, trigger.nick, pronouns)
+        else:
+            bot.say("I don't know {}'s pronouns. They can set them with "
+                    ".setpronouns")
+
+
+def say_pronouns(bot, nick, pronouns):
+    for short, set_ in KNOWN_SETS.items():
+        if pronouns == set_:
+            break
+        short = pronouns
+
+    bot.say("{}'s pronouns are {}. See http://pronoun.is/{} for "
+            "examples.".format(nick, pronouns, short))
+
+
+@commands('setpronouns')
+@example('.setpronouns they/them/their/theirs/themselves')
+def set_pronouns(bot, trigger):
+    pronouns = trigger.group(2)
+    disambig = ''
+    if pronouns == 'they':
+        disambig = ' You can also use they/.../themself, if you prefer.'
+        pronouns = KNOWN_SETS.get(pronouns)
+    elif pronouns == 'ze':
+        disambig = ' I have ze/hir. If you meant ze/zir, you can use that instead.'
+        pronouns = KNOWN_SETS.get(pronouns)
+    elif len(pronouns.split('/')) != 5:
+        pronouns = KNOWN_SETS.get(pronouns)
+        if not pronouns:
+            bot.say(
+                "I'm sorry, I don't know those pronouns. You can give me a set "
+                "I don't know by formatting it "
+                "subject/object/possessive-determiner/posessive-pronoun/"
+                "reflexive, as in they/them/their/theirs/themselves"
+            )
+            return
+    bot.db.set_nick_value(trigger.nick, 'pronouns', pronouns)
+    bot.reply("Thanks for telling me!" + disambig)