plugins/twitter: added hook.regex for twitter URLs

Also minor changes in output formatting
tag: fix `.tag <tag>` searching
add in giphy (.gif query)
random choice of first ten results, consistency with gis
Merge pull request #94 from bwreilly/master

Added GIF search plugin
tag.py: split .tag into .tag/.tags/.tagged, add automatic pagination
.near: show closest users to you
youtube: add '.yt' alias
Update twitter.py

Replace newlines with space, looks nicer
tag.py: add .untag, so each tag action has its own command
near: show users near you. experimental.
flake8 + autopep8 (whitespace fixes)
Merge pull request #95 from factormystic/patch-1

Update twitter.py
near: add 'miles' option
Modified http util to support additional headers

Inverted some header logic

Removed user_agent and referer from http, in favor of headers dict

http: formatting

http: Fixed missing part in conditional
Merge pull request #97 from parkrrr/feature-http-headers

Feature http headers
bitcoin: use BTC-e instead of MtGox
tag: warn users when they try to use the old methods
yahooanswers: flip answer / link order
remember: add s/from/to syntax for easier modifications