Added referer field to http.py, as to make it possible to use a referer. I
don't know if this was possible before, and if it was it should be removed
and the appropriate changes should be made without the http.py change.

Stock plugin output was changed so the percent change has an actual
percentage sign after it.

UrbanDictionary plugin was changed to use a referer because it didn't work
without it.
Problem with urbandict plugin fixed by replacing \r\n with a space
Merge pull request #60 from dentist/master

Fix @hook.singlethread when the hook throws
imdbapi.com moved to omdbapi.com, so that's fixed.
Switch the weather plugin to the wunderground api
Merge pull request #61 from sklnd/wunderground-api

Switch the weather plugin to the wunderground api
change the twitter base url to api v1
Merge pull request #62 from eaceaser/fix_twitter_api_base_url

Fix the Twitter base URL
Add Yahoo! Answers plugin

The .answer command will search Yahoo! Answers with the given query and
respond with one of the 'chosen' answers returned by Yahoo's API and a
link to the question.
Merge pull request #57 from Atheuz/master

UrbanDictionary fixed, required me to change http.py - Also minor nitpick with stock.py
Merge pull request #65 from tomjakubowski/yahoo-answers

Add Yahoo! Answers plugin
fix imdb
cleanup rottentomatoes
refactor apikey retrieval, fix lastfm with empty input
fix somethingawful post count
Fixed display of /me
Fixes .bitcoin command to use the new mtgox API.
Merge pull request #69 from crisisking/master

Fixes the broken .bitcoin command
New, simplified twitter plugin with support for API 1.1.
Merge pull request #68 from dpedu/master

Fixed display of /me