* convinience methods for parameter handling in AbstractOperation
 * bug fixes

 * created new operation to re-rank given list of IDs with respect to query object and return the top-k
 * created a common abstract ancestor for all operations that have a query object specified by locator
 * RefineCandOperation moved to package .query

 * added an Extractor that wraps existing extractor with putting the created object to MetaObject

* Fixed object count when rewriting deleted object

 * CoreApplication: handling of new lines in .description(After) and in operationErrorCode and operationAnswer
 * new error codes added
 * new KNNQueryByLocatorOperation created (String locator, int k)

Conflicts:
	src/main/java/messif/objects/extraction/Extractors.java

* Added parameter to get data for socket extractor from parameter (e.g. url)

 * added a BucketErrorCode.SOME_OBJECTS_NOT_FOUND
 * convert  now allows Bean-like empty constructor callins within parameter string