Update Python documentation (3.6.4)

Author: Thibaut

assets/javascripts/templates/pages/about_tmpl.coffee

@@ -522,7 +522,7 @@ credits = [
     'https://www.postgresql.org/about/licence/'
   ], [
     'Python',
-    '2001-2017 Python Software Foundation<br>Python is a trademark of the Python Software Foundation.',
+    '2001-2018 Python Software Foundation<br>Python is a trademark of the Python Software Foundation.',
     'PSFL',
     'https://docs.python.org/3/license.html'
   ], [

lib/docs/scrapers/python.rb

@@ -19,12 +19,12 @@ class Python < FileScraper
       library/sunau.html)
 
     options[:attribution] = <<-HTML
-      &copy; 2001&ndash;2017 Python Software Foundation<br>
+      &copy; 2001&ndash;2018 Python Software Foundation<br>
       Licensed under the PSF License.
     HTML
 
     version '3.6' do
-      self.release = '3.6.1'
+      self.release = '3.6.4'
       self.dir = '/Users/Thibaut/DevDocs/Docs/Python36' # docs.python.org/3.6/download.html
       self.base_url = 'https://docs.python.org/3.6/'