4.8.2

Support compressed array, produced with newest TBufferJSON

• $arr field identify such array and contains data type
• native arrays are used when decoding such array
• zero values are not stored
• many similar values stored as one with repetition factor
• position stored only when differ from produced with previous block
• array [3,3,3,3,3,3,1,2,2,2,2,2,2,2] compressed as {$arr:"Int",len:14,v:3,n:6,v1:1,v2:2,n2:7}