Shrink input data requirements

The input data requirements have been streamlined so that one less file is required. The data previously provided in a CSV with the current send population to project forward from is now generated automatically from the final year of transitions data.

Allow modification of any type of transition

Previously only joiner transition rates were modifiable, now we can modify joiner, leaver, mover to and mover from rates. Also added better/more tests

Transition validation

Fixed erroneous states in transition demo data

Transition validation

Validation input data is now slightly different so the model knows which settings can be transition between.

Additional Sankey plots for projected transitions

Previously only historic transitions were plotted, to help inform regarding how the transition rates were calculated.

For testing purposes and to elucidate interesting aspects of projections, there are now a number of functions which can be used to plot all (i.e. all simulated) future projected transitions. Currently these are not built into the model and require a small commented-out section to run so as to format the projection data correctly.

v1.3.2: Merge pull request #41 from MastodonC/fix/file-names-in-r-script

Fix file naming in R script

v1.3.1: Merge pull request #40 from MastodonC/fix/consistent-naming

Added markdown support for model report.
Made output file naming consistent.
Fix for bug where model failed if run without a target directory.

v1.2.5: Merge pull request #38 from MastodonC/fix/output-all-transitions

Output all transitions despite print length restrictions

v1.2.4: Merge pull request #37 from MastodonC/fix/make-splice-year-default-nil

Removed defaulting splice-by-ncy to 11

v1.2.3: Merge pull request #36 from MastodonC/fix/scale-pop-plot-text-size

Force scaling of text in x axis of total population plot