add byteSize functions to sampled (inverse) suffix array classes
add byteSize() functions to huffman coding classes
add byteSize() function to succinct lcp class
add byteSize() function to ImpHuffman LF class
add byteSize() function to RMM tree class
deserialise arrays in chunks instead of a single piece
add byteSize() function
add byteSize() function to ImpHuffmanWaveletTree class
add byteSize() function to compressed suffix tree class