Changes in aphylo version 0.3-0

-   Preparing for CRAN.

-   Added examples to every function.

-   Fixed bug in auc(): Was still using NAs in the predicted values.

-   Fixed bug in aphylo_formulae(): Passing subsetted trees, e.g.,
    atree[[1]], now works.

Changes in aphylo version 0.1.99

-   First version
