Bring back "de265_decode_data(...)".

Mark as deprecated and don't include if "LIBDE265_DISABLE_DEPRECATED" is defined.
That way existing applications don't break after updating to the latest version.
"Deprecated" attribute must be before function.
Merge pull request #31 from fancycode/old_api_compat

Bring back "de265_decode_data(...)".
remove unnecessary PTS counter in de265_decode_data()
Support user custom output file
Enable SSE4 code in VS2008
simplify calculate of initType
Reduce items of SAO_MERGE_FLAG
Reduce items of SAO_TYPE_IDX
Reduce items of SPLIT_CU_FLAG
Reduce items of CU_SKIP_FLAG
Reduce items of PART_MODE and optimize decode_part_mode
Reduce items of PREV_INTRA_LUMA_PRED_FLAG
Reduce items of INTRA_CHROMA_PRED_MODE
Reduce items of CBF_LUMA
Reduce items of CBF_CHROMA
Reduce items of SPLIT_TRANSFORM_FLAG
Reduce items of LAST_SIGNIFICANT_COEFFICIENT_*_PREFIX
Reduce items of CODED_SUB_BLOCK_FLAG
Reduce items of COEFF_ABS_LEVEL_GREATER1_FLAG