Add Q&A section to README.

README.rst

@@ -38,6 +38,12 @@ Archive repository with all its submodules.
 
       --dry-run             Don't actually archive anything, just show what would be done.
 
+Questions & Answers
+-------------------
+
+| Q: How to exclude files?
+| A: Mark paths you want to exclude in the .gitattributes file with the export-ignore attribute. Read more on `git-scm.com <https://git-scm.com/docs/gitattributes#_code_export_ignore_code>`_.
+
 Support
 -------
 If functional you need is missing but you're ready to pay for it, feel free to `contact me <mailto:[email protected]?subject=git-archive-all>`_. If not, create an issue anyway, I'll take a look as soon as I can.