Implemented historical time series of veg parameters (LAI, albedo).
Added historical time series of partial veg cover fraction.
Merge branch 'feature/veg_hist' of https://github.com/tbohn/VIC into tbohn-feature/veg_hist

Conflicts:
	src/ChangeLog
	src/global.h
	src/runoff.c
Merge branch 'tbohn-feature/veg_hist' into develop
Merge branch 'feature/vegcover' of https://github.com/tbohn/VIC into tbohn-feature/vegcover

Conflicts:
	src/global.h
Merge branch 'tbohn-feature/vegcover' into develop
remove ARC_SOIL and SOIL_DIR from global.param.sample

fixes #120
Merge branch 'develop' into dev_5.0

Conflicts:
	src/calc_veg_params.c
	src/display_current_settings.c
	src/dist_prec.c
	src/penman.c
	src/vicNl.c