function loadRelativeScript(src) {
    importScript(baseUrl + src);
  }
Loads both library and application sources.  Chooses compiled or debug
version of the sources based on the presence or absence of the URL parameter
"compiled".  Uses the global arrays COMPILED_JS, COMPILED_DEBUG_JS, and
UNCOMPILED_JS, defined by the application in advance.

This dynamic loading process is not necessary in a production environment,
but simplifies the process of switching between compiled and uncompiled
mode during development.