[python-events] Please add PyConES 2015

[Juan Luis Cano]

Please add the following event:

  * name of the event: PyConES 2015
  * type of event: Conference
  * focus on Python:
  * approximate number of attendees: 360 attendees
  * location (incl. country): Valencia, Spain
  * dates/times/recurrence (incl. time zone): from 2015-10-20 to 2015-10-22
  * URL: <a href="http://2015.es.pycon.org/">PyConES 2015</a>