Bitstream debugging basop

I this MR, I implemented a nicer version of bitstream debugging output. For each bit written to the bitstream with the corresponding functions, an annotation string is stored in the Indice struct. Whenever the index list is updated, the strings are managed accordingly. When the indices are written, the frame number, element id, number of bits, values, and the description are written to a readable text file. There are also few instances where the bitstream is manipulated without using the proper functions. In these cases the annotations are taken care of individually.