Lifelib

An example notebook, [3. Memory-Optimized Mutiprocess Example](https://lifelib.io/libraries/notebooks/savings/savings_example3.html) is added to the [savings](https://lifelib.io/libraries/savings/index.html#module-savings) library. This example demonstrates how to effectively run a heavy model with a large data set. The demonstration utilizes techniques such as:

* Multiprocessing using ipyparallel
* Memory-optimized runs introduced in modelx v0.19.0

This release adds a new example, 2. Extended Stochastic Example in the savings library, and reflects some cosmetic changes in the savings models. Find out more at https://lifelib.io/releases/relnotes_v0.3.2.html

To update lifelib, run the following command:

>>> pip install lifelib --upgrade