AE: add right-aligned S24 format, ALSA style
AE: Explain the conversion between SNE24NE and SNE24NER
AE: remove convert function from ActiveAESink
ActiveAE: remove convert functions from input stream
AE: drop obsolete AEConvert class
AE: drop unneeded format AE_FMT_S8
AE: drop obsolete class AERemap
AESinkPULSE: Clean all BigEndian and LittleEndion Formats