add openpyx Fixes vinta#360

Author: vinta

README.md

@@ -215,6 +215,7 @@ A curated list of awesome Python frameworks, libraries and software. Inspired by
     * [xlwt](https://github.com/python-excel/xlwt) / [xlrd](https://github.com/python-excel/xlrd) - Writing and reading data and formatting information from Excel files.
     * [XlsxWriter](https://xlsxwriter.readthedocs.org/) - A Python module for creating Excel .xlsx files.
     * [xlwings](http://xlwings.org/) - A BSD-licensed library that makes it easy to call Python from Excel and vice versa.
+    * [openpyxl](https://openpyxl.readthedocs.org/en/latest/) - A library for reading and writing Excel 2010 xlsx/xlsm/xltx/xltm files.
     * [Marmir](https://github.com/brianray/mm) - Takes Python data structures and turns them into spreadsheets.
     * [unoconv](https://github.com/dagwieers/unoconv) - Convert between any document format supported by LibreOffice/OpenOffice.
 * PDF
@@ -1109,7 +1110,6 @@ Where to discover new Python libraries.
 * [CoolGithubProjects](http://coolgithubprojects.com/) - Sharing cool github projects just got easier!
 * [Full Stack Python](http://www.fullstackpython.com/) - Plain English explanations for every layer of the Python web application stack.
 * [Django Packages](https://www.djangopackages.com/) - A directory of reusable apps, sites, tools, and more for Django projects.
-* [PyFormat](http://pyformat.info/) - Simple usage examples for Python string formatting
 
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