Add usage info to readme
Fixed architecture detection test on ci appveyor

The `cyg-apt update` command must be executed with the tested Python.
Fixed the argparser test

The tearDown method was not define properly.
Added contributing informations

It's base on the [Symfony contributing standard][0].

[0]: http://symfony.com/doc/current/contributing/code/patches.html
Improve English in contributor guidelines
Merge pull request #48 from alquerci/add/contributing

Added contributing informations
Fixed the license abbreviation
Merge pull request #13 from nylen/add-usage-info

Add usage info to readme
Merge pull request #52 from alquerci/fix/license_abbreviation

Fixed the license abbreviation
Added test for the result of the `setup` command
Fixed Windows platform for build the library

When the `--plat-name` option is empty the resulting tar file name:
    - Windows: <program name>-<version>.tar
    - Cygwin:  <program name>-<version>..tar

So we need to specified the platform.

Maybe it's better to use only a marker instead of the real platform.
Merge pull request #37 from alquerci/fix/win_build

Fixed Windows platform for build the library
Merge pull request #44 from alquerci/fix/ci/appveyor

Fixed architecture detection test on ci appveyor
Merge pull request #45 from alquerci/fix/test/argparser_tearDown

Fixed the argparser test
Merge pull request #53 from alquerci/ipv/test/setup

Added test for the result of the `setup` command
Added a backward compatibility for `skipTest` method for python 2.6
bug #14 Added a backward compatibility for `skipTest` method for python 2.6 (alquerci)

This PR was merged into the 1.1-dev branch.

Discussion
----------

Added a backward compatibility for `skipTest` method for python 2.6

| Q               | A
| --------------- | ---
| Bug fix?        | yes
| New feature?    | no
| BC breaks?      | no
| Deprecations?   | no
| Tests pass?     | yes
| Related tickets | #11
| License         | GNU GPLv3

Commits
-------

79de823 Added a backward compatibility for `skipTest` method for python 2.6
Moved user config file detection to a dedicated method
Use the program usage of the argparse Python module on a parse error
Moved the `CygAptSetup` instantiation after argv parsing