Update API (#457) * explicitly define `BROTLI_BOOL` to be `int` * add `BROTLI_` prefix to `MAKE_UINT64_T` macros * replace `true`/`false`/`1`/`0` mentions with `BROTLI_TRUE`/`FALSE` * add `BrotliEncoderSetParameter` documentation * add explicit caution to `BrotliEncoderMaxCompressedSize` * fix formatting in `port.h`