TargetExecutor finished. Now finework in the TargetJob's has do be done.
Concept of TargetJobContext.java introduced.
A lot of new interfaces and classes for job handling.
new property keys:
  - sdi.target.ignoreFailedPerson
  - sdi.target.tmpDir
SdiException: new constant for NoError
new Exception SdiDuplicatePersonException.java

Enhancements:
UserPropertyOverloader: name of new PropertySource is now prefixed by "user."
PasswordEncryptor (intf): NoSuchAlgorithmException removed.
PasswordEncryptor (class): now also spring bean
ReportMsg enhanced

Bugfixes:
 - CsvCollector: NullField class introduced to avoid null in empty fields
 - InputTransformerProperties.java: Check if primary key of person is present (still hardcoded to email address)