drop Python 3.3 support

.travis.yml

@@ -1,6 +1,5 @@
 language: python
 python:
-  - "3.3"
   - "3.4"
   - "3.5"
   - "3.6"

README.rst

@@ -5,7 +5,7 @@ gallery-dl
 *gallery-dl* is a command-line program to download image-galleries and
 -collections from several image hosting sites such as pixiv.net, exhentai.org,
 danbooru.donmai.us and several more (see `Supported Sites`_).
-It requires Python 3.3+ to run and works on Unix-like systems as well as on
+It requires Python 3.4+ to run and works on Unix-like systems as well as on
 Windows.
 
 

gallery_dl/__init__.py

@@ -9,7 +9,7 @@
 from __future__ import unicode_literals, print_function
 
 __author__ = "Mike Fährmann"
-__copyright__ = "Copyright 2014-2017 Mike Fährmann"
+__copyright__ = "Copyright 2014-2018 Mike Fährmann"
 __license__ = "GPLv2"
 __maintainer__ = "Mike Fährmann"
 __email__ = "mike_faehrmann@web.de"
@@ -17,7 +17,7 @@ __email__ = "mike_faehrmann@web.de"
 import sys
 
 if sys.hexversion < 0x3030000:
-    print("Python 3.3+ required", file=sys.stderr)
+    print("Python 3.4+ required", file=sys.stderr)
     sys.exit(1)
 
 import json

setup.py

@@ -75,7 +75,7 @@ setup(
     maintainer="Mike Fährmann",
     maintainer_email="mike_faehrmann@web.de",
     license="GPLv2",
-    python_requires=">=3.3",
+    python_requires=">=3.4",
     install_requires=[
         "requests >= 2.4.2",
     ],
@@ -93,7 +93,6 @@ setup(
         "License :: OSI Approved :: GNU General Public License v2 (GPLv2)",
         "Operating System :: Microsoft :: Windows",
         "Operating System :: POSIX",
-        "Programming Language :: Python :: 3.3",
         "Programming Language :: Python :: 3.4",
         "Programming Language :: Python :: 3.5",
         "Programming Language :: Python :: 3.6",