Merge pull request #7632 from s0undt3ch/issues/7244-archive.tar-untar

Properly support decompressing `tar` files. Refs #7244.
Merge pull request #7633 from s0undt3ch/issues/7244-archive.tar-untar

Properly format the call(missing white-space).
Mimic the test case shown @ http://goo.gl/UI7uS8
Jinja needs to be "fed" Unicode data. Fixes #7576.

Additionally, what's returned from `render_jinja_tmpl` is also a Unicode string to that the `SLS_ENCODER` can properly encode them. Encoding UTF-8 data as UTF-8 data using the `SLS_ENCODER` does not, of course, work.