Drop support for Python 2

It's hard to maintain both versions, having unicode issues in py2, etc.

.travis.yml

@@ -1,7 +1,6 @@
 language: python
 
 python:
-  - "2.7"
   - "3.3"
   - "3.4"
   - "3.5"

requirements.txt

@@ -1,3 +1,2 @@
 requests>=2.13,<3.0
 beautifulsoup4>=4.5.0,<5.0
-future>=0.16

setup.py

@@ -18,8 +18,6 @@ setup(
     classifiers=[
         'Development Status :: 4 - Beta',
         'License :: OSI Approved :: GNU General Public License v3 (GPLv3)',
-        'Programming Language :: Python :: 2',
-        'Programming Language :: Python :: 2.7',
         'Programming Language :: Python :: 3',
         'Programming Language :: Python :: 3.3',
         'Programming Language :: Python :: 3.4',
@@ -30,7 +28,6 @@ setup(
     install_requires=[
         "requests>=2.13,<3.0",
         "beautifulsoup4>=4.5.0,<5.0",
-        "future>=0.16",
     ],
     entry_points={
         'console_scripts': [

toot/__init__.py

@@ -1,6 +1,4 @@
 # -*- coding: utf-8 -*-
-from __future__ import unicode_literals
-from __future__ import print_function
 
 from collections import namedtuple
 

toot/api.py

@@ -4,7 +4,7 @@ import logging
 import re
 import requests
 
-from future.moves.urllib.parse import urlparse, urlencode
+from urllib.parse import urlparse, urlencode
 from requests import Request, Session
 
 from toot import CLIENT_NAME, CLIENT_WEBSITE

toot/app.py

@@ -1,6 +1,4 @@
 # -*- coding: utf-8 -*-
-from __future__ import unicode_literals
-from __future__ import print_function
 
 import webbrowser
 

toot/commands.py

@@ -1,6 +1,4 @@
 # -*- coding: utf-8 -*-
-from __future__ import unicode_literals
-from __future__ import print_function
 
 import json
 import requests
@@ -9,7 +7,7 @@ import webbrowser
 from bs4 import BeautifulSoup
 from builtins import input
 from datetime import datetime
-from future.moves.itertools import zip_longest
+from itertools import zip_longest
 from getpass import getpass
 from itertools import chain
 from textwrap import TextWrapper, wrap

toot/console.py

@@ -1,8 +1,5 @@
 # -*- coding: utf-8 -*-
-from __future__ import unicode_literals
-from __future__ import print_function
 
-import os
 import sys
 import logging
 

toot/output.py

@@ -1,11 +1,8 @@
 # -*- coding: utf-8 -*-
-from __future__ import unicode_literals
-from __future__ import print_function
 
 import sys
 import re
 
-
 START_CODES = {
     'red':     '\033[31m',
     'green':   '\033[32m',

toot/utils.py

@@ -1,6 +1,4 @@
 # -*- coding: utf-8 -*-
-from __future__ import unicode_literals
-from __future__ import print_function
 
 import re