StringIO is part of io in python3

> The StringIO and cStringIO modules are gone. Instead, import
> the io module and use io.StringIO or io.BytesIO for text and
> data respectively.

- http://docs.python.org/3.0/whatsnew/3.0.html

Avoid TB in python3 when performing buffered IO.
Buffered IO must use bytes, not string, to avoid...

Traceback (most recent call last):
  File "/home/sandbox/test/functional/multiproject_tests.py", line 68, in setUp
    self.create_project(TEST_PKG_1, os.path.join(self.repo_dir, 'pkg1'))
  File "/home/sandbox/test/functional/fixture.py", line 198, in create_project
    tito('tag --keep-version --debug --accept-auto-changelog')
  File "/home/sandbox/test/functional/fixture.py", line 103, in tito
    return CLI().main(argstring.split(' '))
  File "/home/sandbox/src/tito/cli.py", line 222, in main
    return module.main(argv)
  File "/home/sandbox/src/tito/cli.py", line 674, in main
        found_changelog = False
    return tagger.run(self.options)
  File "/home/sandbox/src/tito/tagger/main.py", line 103, in run
    self._tag_release()
  File "/home/sandbox/src/tito/tagger/main.py", line 123, in _tag_release
    self._make_changelog()
  File "/home/sandbox/src/tito/tagger/main.py", line 229, in _make_changelog
    os.write(fd, "# Create your changelog entry below:\n")
nose.proxy.TypeError: TypeError: 'str' does not support the buffer interface
avoid TB on python3 due to git format string

Use RawConfigParser instead of ConfigParser to avoid...

Traceback (most recent call last):
  File "/home/sandbox/test/functional/multiproject_tests.py", line 68, in setUp
    self.create_project(TEST_PKG_1, os.path.join(self.repo_dir, 'pkg1'))
  File "/home/sandbox/test/functional/fixture.py", line 198, in create_project
    tito('tag --keep-version --debug --accept-auto-changelog')
  File "/home/sandbox/test/functional/fixture.py", line 103, in tito
    return CLI().main(argstring.split(' '))
  File "/home/sandbox/src/tito/cli.py", line 222, in main
    return module.main(argv)
  File "/home/sandbox/src/tito/cli.py", line 671, in main
    offline=self.options.offline)
  File "/home/sandbox/src/tito/tagger/main.py", line 51, in __init__
    ConfigObject.__init__(self, config=config)
  File "/home/sandbox/src/tito/config_object.py", line 38, in __init__
    config.get(section, options))
  File "/usr/lib64/python3.3/configparser.py", line 1184, in set
    super().set(section, option, value)
  File "/usr/lib64/python3.3/configparser.py", line 889, in set
    value)
  File "/usr/lib64/python3.3/configparser.py", line 399, in before_set
    "position %d" % (value, tmp_value.find('%')))
nose.proxy.ValueError: ValueError: invalid interpolation syntax in '%s (%ae)' at position 0
avoid TB on python3 due to encoding within subprocess pipeline

subprocess.getstatusoutput can fail with utf8 UnicodeDecodeError
http://bugs.python.org/issue9922

Resolves this TB on python3, which was
caused by outputting binary data to the 'tee' command...

Traceback (most recent call last):
  File "/home/sandbox/test/functional/multiproject_tests.py", line 133, in test_build_tgz
    artifacts = tito('build --tgz')
  File "/home/sandbox/test/functional/fixture.py", line 103, in tito
    return CLI().main(argstring.split(' '))
  File "/home/sandbox/src/tito/cli.py", line 222, in main
    return module.main(argv)
  File "/home/sandbox/src/tito/cli.py", line 390, in main
    return builder.run(self.options)
  File "/home/sandbox/src/tito/builder/main.py", line 130, in run
    self.tgz()
  File "/home/sandbox/src/tito/builder/main.py", line 401, in tgz
    self._setup_sources()
  File "/home/sandbox/src/tito/builder/main.py", line 436, in _setup_sources
    os.path.join(self.rpmbuild_sourcedir, self.tgz_filename))
  File "/home/sandbox/src/tito/common.py", line 518, in create_tgz
    run_command(archive_cmd)
  File "/home/sandbox/src/tito/common.py", line 221, in run_command
    (status, output) = getstatusoutput(command)
  File "/home/sandbox/src/tito/compat.py", line 45, in getstatusoutput
    raise(err)
  File "/home/sandbox/src/tito/compat.py", line 41, in getstatusoutput
    (status, output) = subprocess.getstatusoutput(cmd)
  File "/usr/lib64/python3.3/subprocess.py", line 683, in getstatusoutput
    text = pipe.read()
  File "/usr/lib64/python3.3/encodings/ascii.py", line 26, in decode
    return codecs.ascii_decode(input, self.errors)[0]
nose.proxy.UnicodeDecodeError: UnicodeDecodeError: ascii
avoid TB on python3 due to strict dict type

On python3, we need to perform a union (not addition) on
dictionary sets to avoid...

Traceback (most recent call last):
  File "/home/sandbox/test/functional/fetch_tests.py", line 95, in test_with_releaser
    self.source_filename)
  File "/home/sandbox/test/functional/fixture.py", line 103, in tito
    return CLI().main(argstring.split(' '))
  File "/home/sandbox/src/tito/cli.py", line 222, in main
    return module.main(argv)
  File "/home/sandbox/src/tito/cli.py", line 599, in main
    **kwargs)
  File "/home/sandbox/src/tito/release/main.py", line 359, in __init__
    prefix="yumrepo-", **kwargs)
  File "/home/sandbox/src/tito/release/main.py", line 238, in __init__
    auto_accept, **kwargs)
  File "/home/sandbox/src/tito/release/main.py", line 73, in __init__
    _args = config_builder_args.items() + kwargs['builder_args'].items()
nose.proxy.TypeError: TypeError: unsupported operand type(s) for +: 'dict_items' and 'dict_items'
Merge pull request #111 from jumanjiman/python3_alpha

alpha support for python3
Remove some dead code.