Further work on extended Q range.
Fixed bug in firspass.c call to vp8_initialize_rd_consts() This was passing in vp8_dc_quant(cm->base_qindex, cm->y1dc_delta_q) instead of (cm->base_qindex + cm->y1dc_delta_q). It just so happens that for the value 26 used for cm->base_qindex in the unextended Q case, the two give similar results. However, when using the extended Q range the two are very different. Also added more stats output and partly disabled another broken feature. Change-Id: Iddf6cf5ea8467c44b7c133f38e629f6ba6f2581e