Drop python 2.7 support and help with encodings

Fixes #312

.travis.yml

@@ -1,6 +1,5 @@
 language: python
 python:
-  - "2.7"
   - "3.4"
   - "3.5"
   - "3.6"

README.md

@@ -19,7 +19,7 @@ If it is not in your `PATH`, you can help GitPython find it by setting
 the `GIT_PYTHON_GIT_EXECUTABLE=<path/to/git>` environment variable.
 
 * Git (1.7.x or newer)
-* Python 2.7 to 3.7.
+* Python 3 to 3.7.
 
 The list of dependencies are listed in `./requirements.txt` and `./test-requirements.txt`.
 The installer takes care of installing them for you.

doc/source/intro.rst

@@ -13,7 +13,7 @@ The object database implementation is optimized for handling large quantities of
 Requirements
 ============
 
-* `Python`_ 2.7 or newer
+* `Python`_ 3.0 or newer
 * `Git`_ 1.7.0 or newer
     It should also work with older versions, but it may be that some operations
     involving remotes will not work as expected.

git/compat.py

@@ -30,7 +30,10 @@
 is_win = (os.name == 'nt')
 is_posix = (os.name == 'posix')
 is_darwin = (os.name == 'darwin')
-defenc = sys.getdefaultencoding()
+if hasattr(sys, 'getfilesystemencoding'):
+    defenc = sys.getfilesystemencoding()
+if defenc is None:
+    defenc = sys.getdefaultencoding()
 
 if PY3:
     import io

git/repo/base.py

@@ -4,6 +4,7 @@
 # This module is part of GitPython and is released under
 # the BSD License: http://www.opensource.org/licenses/bsd-license.php
 
+from builtins import str
 from collections import namedtuple
 import logging
 import os

requirements.txt

@@ -1 +1,3 @@
 gitdb2 (>=2.0.0)
+gitdb>=0.6.4
+ddt>=1.1.1

setup.py

@@ -79,7 +79,7 @@ def _stamp_version(filename):
     package_data={'git.test': ['fixtures/*']},
     package_dir={'git': 'git'},
     license="BSD License",
-    python_requires='>=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*',
+    python_requires='>=3.0, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*',
     install_requires=requirements,
     tests_require=requirements + test_requirements,
     zip_safe=False,
@@ -102,8 +102,6 @@ def _stamp_version(filename):
         "Operating System :: Microsoft :: Windows",
         "Operating System :: MacOS :: MacOS X",
         "Programming Language :: Python",
-        "Programming Language :: Python :: 2",
-        "Programming Language :: Python :: 2.7",
         "Programming Language :: Python :: 3",
         "Programming Language :: Python :: 3.4",
         "Programming Language :: Python :: 3.5",