Heads up on v0.1.1

[fumitoh]

A new release is planned later this month, and here're some heads-up on what's new:

• lifelib projects will be called libraries from the next lifelib release.

• The next release will introduce basiclife, a new library for simple term life projection.
  This library includes 2 models, one is a single model point model and the other is a multiple model point model.
  Both produce the same results but in different ways. The former is easier to understand but slower, while the latter
  runs faster and suitable for running with a large number of model points but formulas are not straight-forward.
  The new library is simpler, easier to customize, more generic than the existing projects such as simpllife and fastlife,
  but the exiting projects will continue to be available in the lifelib package.