*   VectorExponential added to distributions.
*   Add a bitwise module with bitwise_and, bitwise_or, bitwise_xor, and invert
    functions.
*   Add fixed-grid ODE integration routines.
*   Allow passing bounds to ScipyOptimizerInterface.
*   Correctness fixes for fft_length parameter to `tf.spectral.rfft` &
    `tf.spectral.irfft`.

SHA-224 checksum in bytes. const size224 = 28 // The block size of SHA-256 and SHA-224 in bytes. const blockSize = 64 // The maximum number of bytes that can be passed to block(). The limit exists // because implementations that rely on assembly routines are not preemptible. const maxAsmIters = 1024 const maxAsmSize = blockSize * maxAsmIters // 64KiB const ( chunk = 64 init0 = 0x6A09E667 init1 = 0xBB67AE85 init2 = 0x3C6EF372 init3 = 0xA54FF53A init4 = 0x510E527F init5 = 0x9B05688C init6 = 0x1F83D9AB...