Also using make for dependency management/ordering.
Includes `tests/stage_sim_and_verif/dependencies.mk` file because I was using that to check my make logic (and the docs example is once again incomplete sby).
Add complex pycode example, generating tasks and then parsing tags to select source files. Warn against doing it, and reiterate the usefulness of `--dumptasks` and `--dumpcfg`.
Modify gen.sh for modifiable script/task and to echo how it was called (in case they need to be regenerated, which isn't a problem for the regular example/task1 but is for the complex one).
