cleanup interface parameters
Merge pull request #969 from ruil2/cleanup_encoder

    cleanup interface parameters
    add bitrate validation
Merge pull request #973 from ruil2/bitrate

    add bitrate validation
fix a bug that dump reconstruct frame
Get rid of mixed tabs and spaces in the aarch64 assembly
Unify the indentation of the new aarch64 assembly
Unify the copyright header in the aarch64 deblocking assembly

This file was the only one that had a differently formatted
copyright header.
Merge pull request #974 from ruil2/bitrate

fix a bug that dump reconstruct frame
Fix building the deblocking aarch64 assembly with gnu binutils
Merge pull request #975 from mstorsjo/cleanup-asm

Clean up the aarch64 deblocking assembly