Fixes #12558

Add tox integration to run unittests in supported python releases.
Travis-CI is used for test execution.

Additionally, the unittest TestQuotePgIdentifier was updated to support
using assert_raises_regexp on python-2.6.

Sample travis-ci output available at
https://travis-ci.org/ansible/ansible/builds/54189977

https://github.com/ansible/ansible/issues/6776

This is an exceedingly rough sketch of what attributes might look like - metaclass implementations NOT complete.

Updates to Makefile include:
 * add targets: deb-src, deb-src-upload, deb-upload
 * add variables to control DEB building: DEBUILD_OPTS, DPUT_OPTS, DEB_PPA, DEB_DIST, DEB_RELEASE
 * create deb files for all release values in DEB_DIST

Several updates to packaging/debian/*
 * Updated control file
 * Whitespace/formatting of changelog

Add deb-build to .gitignore

An unofficial build is any build where OFFICIAL != yes.  This patch adjusts the
conditional accordingly.

Fixes #7224

Fixes #6471

Partially resolves #6471

This reverts commit 6f1a58ab.

The NOSETESTS variable can be used to support customizing the nosetests
parameters.  This allows providing custom nose parameters such as
--with-coverage.

build manpages.

If someone try to run the test suit with ansible already installed,
the mix between content in /usr/share and in the git checkout
can result in strange failure ( as I found out the hard way ). For example,
the test_copy module will call the action plugin for copy from git,
who will call the 'file' module from system, passing unsupported arguments

- use egrep patterns to detect BSDs in one ifeq
- use seconds-since-epoch as input for BSD date (-r option)
- get seconds-since-epoch from git log with "%at" format string

this is to make use python2 when nosetests points to python3:

make NOSETEST=nosetests-2.7 tests