Pandoc-tablenos

* Documentation updates.

* Added numbering tables by section for html and pdf
(pandoc-eqnos Issue 15).

* Clickable internal links for docx (pandoc-fignos Issue 25).

* Use custom caption name for tagged tables.
* Python 2.7.3 bug addressed with pandoc-xnos 0.7.
* Clarified purpose of this filter in README.md (Issue 4).

* Updated for pandoc 1.18 (pandoc-fignos Issue 30)

* Fixed metadata corruption bug (pandoc-fignos Issue 23).
* Fixed python 2.7 install on Windows (pandoc-fignos Issue 27).
* Require pandoc-xnos >= 0.5.