add regex test check_for_url
provide basic validation method "contains_nuts"
add constraint to any textfield a visitor can fill to find the mean spammers
reject_links property: initialize and use in validation
take out duplicate keyword
clean up constraints
add new reject links property
add test cases for different settings of reject links option
agent contact: small improvement validators
added test cases for validation
add standard portletItem class to agent_contact portlet template. This little issue causes a lot of trouble
Merge branch 'master' of github.com:Solomonic/plone.mls.listing into Solomonic-master

Merged upstream changes.