Trigger::property_is ( property_name, value )
    returns true if the widget has property I<property_name> equal to I<value>

  Trigger::and ( trigger1, trigger2 )
    returns true if both trigger1 and trigger2 are true

  Action::email ( address, template )
    fills in I<template> and emails the resulting text to I<address>

  Action::also ( action1, action2 )
    performs I<action1>, and if successful also performs I<action2>

  etc.