Removed netbean's project conf file.

See merge request !1

creating a special algorithm for the (deprecated) version with PPP-Tree leaves on the disk

* fixed a bug in delete operation (if two objects with the very same PPP were to be deleted, only the latter was actually deleted)

 * when serializing, the internal nodes are now locked using "writeLock()" and the leafs are not locked
 * added synchronization of "compact" methods in leaves
 * added several tests for both standard and file-oriented PPP-Codes
 * PPPCOdeAlg now supports "getObjectCount" method and operation

 * better logging in case of a problem
 * code cleared in constructors of Leaf cells
 * finalize() now executes data consolidation and tree serialization

   - deleted objects (IDs) are marked as deleted within an array of indexes in the leaf node
   - these deleted indexes are NOT used for "getAllObjects"
   - they are only applied during the "consolidate" calling (which is now trigerred during every serialization of the leaf)

 * added a variant of the PPP-Code Voronoi tree that keeps the data (PPP-Codes + IDs) in a separate binary storage
 * it should be fully backwards compatible

 * because M-Index (MIndex.java) does not use the "max_number_of_objects" parameter, the PPPCodes.java is to return the max. number objects - in the future probably given by the StringToInt ID converter
 * ApproxNavProcessorPPPCodes now implements just NavProc<AbstractOperation> so that the "GetCandSetProcessor.getOperation" can return the GetCandOperation (not the included KNNOper)

 * version increased

 * version set to 1.2.4 (compatible with messif 2.1.4)

    - (not used for K-NN query processing)
 * renaming to be more intuitive (processors)
 * 

 * fixed returning of supproted operations

 * parallel & sequential initiator classes merged
 * clear split of two PPP-Code index variants: 
   1) just index without any ID-object store for refinement (class PPPCodeAlgorithm)
   2) "old" variant with the internal int-object store (class PPPCodeAlgorithmRefinement)
 * support of GetCandSetOp
 * refactoring and restructuralization of the approx. navigation processors
 * BUG FIX in PPPCodeObj R&W

* packages with EarthMover's Distance and with Sketch implementation moved to a new project "ppp-codes-private"

 * The GPL header of all files slightly changed

 * GPL licence added to all sources

 * DC refinement now uses 4 threads

 * pivot selection modified to fit sketches
 * added basic impl. of EMD (JFastEMD)

 * modified pivot selection (to get best balance)
 

     (e.g. usage of Trove library)
 * started implementation of Muller-Molina's Sketch

 * improved statistics from the approx search 
 * PPPCodeObjects now enable a "lazy" reading - IDs are actually read only when really needed
 * PPP-Tree leaf node now enables refinement of the query-PPP distance by reading the stored PP suffixes
 * IDObjectRAStorage now uses the asynchronous access to disk storage