* Compilers
    * Review PDD31. Move it out of draft if it's good, or tweak it until it is.
    * Unify IMCC entry points (imcc_run_api and imcc_compile_file) and cleanup
    * Move as much argument-processing logic out of IMCC as possible. Ideally, IMCC should not process any commandline arguments
    * Create a new PIR compreg using IMCC, following PDD31 as closely as possible
    * IMCC should return a PackFile, and not immediately write to or merge to interp->initial_pf or interp->code.
 * Exceptions
    * Make Exception and ExceptionHandler properly subclassable
 * Packfiles
    * Start working on a new Packfile API to encapsulate that system