fixed both errors after sphinx build
Merge pull request #7511 from aboe76/fix_docs

fixed both errors after sphinx build
Specify reason for Python 2.7 requirement

While ElementTree is in Python 2.6, we need the expanded support
for xpath which was introduced in Python 2.7.

As discussed in #7264, it might be possible to install
`elementtree-1.3a3-20070912` for Python 2.6, but this is yet untested.
Merge pull request #7513 from holmboe/skipif-version_info

Specify reason for Python 2.7 requirement
Add --ssh-priv option to SaltSSHOptionParser
Fix grammar in Watch In state documentation
Merge pull request #7520 from graingert/patch-1

Fix grammar in Watch In state documentation
Merge pull request #7514 from paluh/develop

Add --ssh-priv option to SaltSSHOptionParser
Shorten --ssh-priv option to --priv
Merge pull request #7521 from paluh/develop

Shorten --ssh-priv option to --priv
add docker
Added docstrings, examples, virtual method
docker: complete create_container
docker: complete export