Publish community recognition guidelines from the PostgreSQL Core Committee.

Publish the community recognition guidelines developed by the PostgreSQL Core
Committee from a navigation off of the "Community" section.  Add URLs from
several other pages on the PostgreSQL website in order to access the guidelines:

  * Donate
  * Events
  * User Groups

Additionally, this patch updates the contact email address for donation questions
to the PostgreSQL Funds Group.

pgweb/util/contexts.py

@@ -54,6 +54,7 @@ sitenav = {
 		{'title': 'International Sites','link':'/community/international/'},
 		{'title': 'Propaganda',         'link':'/community/propaganda/'},
 		{'title': 'Resources',          'link':'/community/resources/'},
+		{'title': 'Recognition Guidelines',       'link':'/community/recognition/'},
 	],
 	'developer': [
 		{'title': 'Developers',         'link':'/developer/'},