Rename the 'humbug' API module to 'zulip'.

(imported from commit b3a3d7c05459cbb0110cd0fbe2197d779f3a6264)

demos/twitter-bot

@@ -4,7 +4,7 @@ import sys
 import optparse
 import ConfigParser
 
-import humbug
+import zulip
 
 CONFIGFILE = os.path.expanduser("~/.humbug_twitterrc")
 
@@ -54,7 +54,7 @@ parser.add_option('--limit-tweets',
     type='int',
     help='Maximum number of tweets to push at once')
 
-parser.add_option_group(humbug.generate_option_group(parser))
+parser.add_option_group(zulip.generate_option_group(parser))
 (options, args) = parser.parse_args()
 
 if not options.twitter_id:
@@ -101,7 +101,7 @@ try:
 except ConfigParser.NoOptionError:
     user_id = options.twitter_id
 
-client = humbug.Client(
+client = zulip.Client(
     email=options.user,
     api_key=options.api_key,
     site=options.site,