readme: add missing dep and sort them alphabetically

README.md

@@ -32,26 +32,27 @@ Requirements
 * MongoDB 2.2 or later
 * redis server
 * Pip3
-  * PyMongo
+  * click
+  * feedformater (for RSS and Atom dump_last) http://code.google.com/p/feedformatter/
   * Flask
-  * Flask-PyMongo
   * Flask-Login
-  * Tornado
-  * Redis
-  * Python-dateutil
-  * passlib
-  * feedformater (for RSS and Atom dump_last) http://code.google.com/p/feedformatter/
-  * Whoosh http://packages.python.org/Whoosh/ (If you're planning to use the Full-text indexer)
+  * Flask-PyMongo
   * irc
-  * sleekxmpp
-  * Werkzeug
-  * Jinja2
   * itsdangerous
-  * click
+  * Jinja2
   * lxml
+  * passlib
+  * PyMongo
+  * Python-dateutil
   * Pytz
+  * Redis
   * requests
+  * requirements-parser
   * six
+  * sleekxmpp
+  * Tornado
+  * Werkzeug
+  * Whoosh http://packages.python.org/Whoosh/ (If you're planning to use the Full-text indexer)
   * xlrd
 
 The requirements can be installed with pip: