CPython pyb.py placeholder: Implement delay().
conwaylife.py: Give people chance to enjoy the show.

Delay between frames; run more generations.
Add dummy micropython module to enable mandel.py run with CPython.
Add empty "micropython" module to allow more seamless CPython portability.

Implicit "micropython" module contains (at least) codegeneration decorators.
Make it explicit, so an app could have "import micropython". On MicroPython,
that will be no-op. On CPython, that will give a chance to have a module
with placeholder decorators.
Merge pull request #180 from pfalcon/examples-improve

Improve compatibility of examples with CPython (+ interp compatibility too)