Changelog

Load files forces to numeric (fixes problems where some imports in character)
Corrected slope_gc() directions (fixes #10)
Clarify output format and allow csv (fixes #13)
flow_mapper() has simplified output, similar to the other functions (fixes #12)
facet_mapper() has facets by number as well as by name, and ordered by crule (fixes #9)
form_mapper() values that are not on missing cells but can’t be calculated due to local missingness, are assigned 0
Can load files even if dem in folder name (fixes #7)
Add rounding to match original LandMapR values where possible
Fix bug where grid parameter not passed on in form_mapper()

Added slope_gc() to calculate slope gradients and curvature (added to dem_fill through flow_mapper())
Added merge_flow_form() to create a single dem file from flow_mapper() dem_fill and all form_mapper() outputs.

Added facet_mapper() based on FacetMapR
Added wepp_mapper() based on WeppMapR
Internal changes to increase form_mapper() speed
Added ARULE deriving based on Li et al. 2011. Canadian Journal of Soil Science 91(2), 251-266.
Added both forms of calculating qweti, qarea, and lnqarea to form_mapper() (Originally values based on actual grid-cell area, now, qweti1, qarea1, lnqarea1 based on number of cells, and qweti2, qarea2, lnqarea2 based on grid-cell area).
Reduced number of output files
Updated reports

Added form_mapper() which mimics FormMapR
Renamed complete_run() to flow_mapper() to clarify what it refers to
Added new comparison reports
Fixed bugs related to incorrect vol2fl, parea and mm2fl
Added calculation of cumulative elevation differences to flow_mapper() which results in local_elev_diff (calculated after pit smoothing) and elev_diff (calculated after fill pits)

LITAP 0.5.0