Fix detect of docker as virtualization_type.

Correct version number.

1.8.4 is the latest stable now, I believe.

This uses the `devel` branch when displaying the travis-ci status badge.

Add tox and travis-ci support

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

added test requirements for pip

fixed and reintroduced syncronize test

fixed and reintroduced syncronize test, fakerunner object needed become_method to be it's default 'sudo'

Nothing we can do, when it sanitizes ssh_urls it's simply overzealous.

fixed and reintroduced syncronize test, fakerunner object needed become_method to be it's default 'sudo'

TODO:
* password prompting needs to be implemented, but is being worked on
  as part of the become privilege escalation changes

Was using persist_files=True when specifying the create paramater,
which breaks pipelining. Switched to use delete_remote_tmp=False instead,
which is the proper way to preserve the remove tmp dir when running
other modules from the action plugin.

changed from hash_merge to combine vars which resets default to

Note: In v1 we fix this by transforming into unicode just before we use
it (when we send it to jinja2) because jinja2 cannot handle non-ascii
characters in str.

In v2 our model is that all text values need to be stored as unicode
type internally.  So we transform this to unicode when we read it from
the inventory file and save it into the internal dict instead.

use to_unicode() in _jinja2_vars if type is str.

Generic package_dir mapping in setup.py (closes #10437)

fixes password error detection for ssh connection plugin

removes sycnronize test that does not work with current sudo setup
Fixes #10434

Fixes #10430

Also removed redundant resolution of sudo/su for backwards compatibility which
confused the conflict detection code.

Typo: lead --> led