forestTIME 2.1.0

• This package has been re-named from forestTIME.builder to forestTIME
• fia_tidy() now only keeps base-intensity plots (INTENSITY == 1).
• Fixed a bug that was causing TPA_UNADJ to not be populated for all trees in states that use macroplots (#160).
• Fixed a bug in fia_split_composite_ids() that caused it to fail when tree_ID was NA (as it is in conditions with no observations). It now falls back on the information in plot_ID when tree_ID is in the data frame but NA (#149).
• fia_estimate() now returns the additional variables DRIBIO_FOLIAGE, VOLTSGRS, and VOLTSSND in addition to DRYBIO_AG and CARBON_AG.
• Code to deal with negative extrapolated values has moved to adjust_mortality(). Therefore, the results of interpolate_data() may now contain negative numbers, which are non-sensible. Use fia_annualize() whenever possible to ensure sensible results.
• fia_download() arguments have changed. keep_zip now defaults to TRUE. extract options have changed from TRUE/FALSE to "forestTIME", "rFIA", "all", or "none" to extract just files needed by forestTIME, those used by rFIA (for compatibility), all files, or none.
• Fixed a bug in interpolation of CONDPROP_UNAJ. Now the workflow retains all "empty" conditions (i.e. CONDIDs with no trees in them) and properly interpolates CONDPROP_UNADJ so the proportion for all conditions in a plot in a year sum to 1 (within rounding error) (#64).
• fia_annualize() now adds and EXPNS column calculated as the total land area of the state in acres divided by the number of plots in the interpolated data. It should be usable in the same ways the EXPNS column in the "raw" FIA data can be used.
• Renames the state_codes dataset to state_areas and adds a column for state land area in acres.