Catmandu::Fix::reject - remove a record form the data
# Reject all items from from the output
# Reject all items with have an 'ignore_me' field
# Reject all items with have a 'ignore' field with value 'true'
# Select all items
# Select only those items that have an 'include_me' field
# Select only those items that have an 'include' field with value 'true'