Return a contactfilter using the maileon contactfilter id.

Example

GET https://api.maileon.com/1.0/contactfilters/contactfilter/1
Content-type: application/vnd.maileon.api+xml
Accept: application/vnd.maileon.api+xml
Authorization: [XXX]

Status: 200 OK
Content-Type: application/vnd.maileon.api+xml

<?xml version="1.0" encoding="UTF-8"?>
<contactfilter>
   <id>1</id>
   <name>MySampleFilter</name>
   <author>xq-freiburg@xqueue.com</author>
   <state>uptodate</state>
   <created>2013-02-15 10:48:38</created>
   <count_contacts>12</count_contacts>
   <count_rules>1</count_rules>
</contactfilter>