Nit: no hardcoded version and current year in Sphinx docs. (#1268)

`Cartographer 1.0.0 documentation` -> `Cartographer documentation`
`Copyright 2016 The Cartographer Authors` -> `Copyright <year> The Cartographer Authors`

docs/source/conf.py

@@ -28,6 +28,7 @@
 
 import sys
 import os
+from datetime import datetime
 
 # If extensions (or modules to document with autodoc) are in another directory,
 # add these directories to sys.path here. If the directory is relative to the
@@ -61,16 +62,17 @@ master_doc = 'index'
 
 # General information about the project.
 project = u'Cartographer'
-copyright = u'2016 The Cartographer Authors'
+copyright = u'{year} The Cartographer Authors'.format(year=datetime.now().year)
 
 # The version info for the project you're documenting, acts as replacement for
 # |version| and |release|, also used in various other places throughout the
 # built documents.
 #
+
 # The short X.Y version.
-version = '1.0.0'
+#version = ''
 # The full version, including alpha/beta/rc tags.
-release = '1.0.0'
+#release = ''
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.