0.1.1 first step towards expansion

This patch both fixes some problems in the previous release, as well as offering a step towards a bigger expansion.

• Some change in the functional representations:
  • Changed random number generation from randfn, a functional representation, to the realise() and realize() functions.
  • Changed probfn representation to be more specific: pmf or density
• Added the enframe suite of functions.
• Implement the beginnings of being able to specify your own distribution, with the set_ suite of functions, after making an empty distribution with dst().

Additionally, there's some internal rearrangement, where the get functions call the eval functions, not vice versa.

0.1.0 First Release

The first version of distplyr is now available! Its functionality is rather limited at the moment, but is still useful, especially for its capability to handle a discrete component of a distribution. Here are the main features:

• Base distributions include step distributions, Gaussian, Uniform, and generalized Pareto.
• Operations include grafting (right) and mixing
• Distribution properties included are moment-related quantities, and extreme value index.
• Distribution representations are mostly comprehensive, perhaps only missing mean excess function and moment generating function.

Take a look at the “Vision” vignette to get a sense of where this package is headed.