password prompt on upload command

Update packaging to 16.7

This adds support for the deprecated python_implementation marker
which was an undocumented setuptools marker prior to 20.2 in
addition to the newer markers.

The upload command wasn't prompting for a password. If there was no
password specified in ~/.pypirc, the upload command,
    python setup.py sdist upload
would fail and raise a TypeError. The workaround for this was to use
    python setup.py sdist register upload
since the register command does prompt for a password.

This commit ensures that the upload command prompts for a password
if not given one by ~/.pypirc or the register command.

Move Python 2.6 exception into specific test, capturing that the expected order is different on Python 2.6, not because of the lack of OrderedDict, but because of different behavior in RawConfigParser. Ref #553.

Use OrderedDict to retain deterministic ordering of version info in egg_info command. Remove lexicographic ordering in setopt.edit_config. Ref #553

egg_info is the dictionary with information that is injected
into setup.cfg. edit_config uses RawConfigParser which uses
collections.OrderedDict for all the data. When we use a
simple dict(), when we loop through items in edit_config, we
see random behavior as a result the fields
tag_svn_revision/tag_date/tag_build are added to the setup.cfg
randomly. So if we sort the items by key when we traverse items
we will get deterministic output as RawConfigParser uses
OrderedDict internally by default.

bump certifi to 2016.2.28

Handle not-zip-safe egg (folder) deletion in rotate command

remove _markerlib from manifest

Signed-off-by: Gabi Davar <grizzly.nyo@gmail.com>

Signed-off-by: Gabi Davar <grizzly.nyo@gmail.com>