dietr 1.1

Major changes

• New function to calculate composite diet indices, CompositeIndices.
• New functions VacuityIndex and GastrosomaticIndex to calculate the vacuity and gastro-somatic indices.
• New function PlotElectivity to plot results returned by the Electivity function.
• New dataset Casaux1998 for tutorial and examples on calculating composite indices.
• New dataset SebastesStomachs for tutorial and examples on calculating vacuity and gastro-somatic indices.

Minor changes

• Updated vignette. These include minor fixes for clarity and the inclusion of examples for the new functions.
• General improvements to documentation.
• Updated dataset Horn1982 to better work with new plotting function.