New Features
* A new function, CLFMdelta, finds the value of
delta such that the model coefficients resulting from
the 'chainladder' function with that value for argument delta are
consistent with an input vector of 'selected' age-to-age factors,
subject to restrictions on the 'selected' factors relative to
the input 'Triangle'. See the paper
"A Family of Chain-Ladder Factor Models for Selected Link Ratios"
by Bardis, Majidi, Murphy, Variance Journal
* A new 'coef' method returns the age-to-age factor coefficients of
the regression models estimated by the 'chainladder' function.
* Exports a function "LRfunction" that calculates a Triangle's
link ratio function and can be used to plot the space of
"reasonable link ratio selections" per the CLFM paper.
Changes
* Removed some package dependencies in DESCRIPTION and moved them
to Imports.