Added a new parameter to allow for fast drainage from hillslope scale deep groundwater store (gw_loss_fast_threshold controls threshold above which fast drainage occurs and gw_loss_fast_coeff multiplies gw_loss_coeff for the faster store) - gw_loss_fast_threshold can be set to -1 to turn off this feature - this is the default!
Updated dynamic phenology so veg 'turns on' in response to environment, no longer using hard coded leaf on/off days
Added option to route hillslope scale groundwater (from -gw) to riparian patches (defined as having ID of 42), user must add -gwtoriparian to the command line and set the soil default ID of riparian patches to 42
Merging branch 'newstrata' into reproduction
Merge branch 'newstrata' into reproduction

Conflicts:
	rhessys/cn/update_phenology.c
added comments to identify missing pieces in code