*   Sifting condition checking system has been revamped to be more flexible.
*   New sift conditions added:
    *   Projections based on functions:
        *   Energy Difference function (for Energy Difference Tracking)
        *   Mean envelope RMS
    *   For the above, we can now stop sifting based on:
        *   Those projections reaching a certain value
        *   Successive values of those projections reaching a certain squared
            difference (Cauchy-inspired convergence)
    *   S-Number Criterion
*   Add test suites