doc: unicode author string

Sphinx v1.6.5 was failing to build the docs on Python 2.7.13.

  Configuration error:
  Invalid latex_documents.author found (might contain non-ASCII chars. Please use u"..." notation instead): ('index', 'stompest.tex', 'stompest Documentation', 'Jan M\xc3\xbcller, Roger Hoover', 'manual')

Switching to a unicode literal resolves this error.

doc/source/conf.py

@@ -196,7 +196,7 @@
 # (source start file, target name, title, author, documentclass [howto/manual]).
 latex_documents = [
   ('index', 'stompest.tex', 'stompest Documentation',
-   'Jan Müller, Roger Hoover', 'manual'),
+   u'Jan Müller, Roger Hoover', 'manual'),
 ]
 
 # The name of an image file (relative to this directory) to place at the top of