A few changes related to CLM scheme:
(1) state variables only used for CLM is added after package "clmscheme"
to save memory
(2) bug fix to correct soil temperature and moisture initializations
(3) delete codes related to urban canopy scheme in CLM
(4) add checks to ensure CLM won't be used with any urban schemes
M phys/module_physics_init.F
M phys/module_surface_driver.F
M share/module_optional_input.F
M Registry/Registry.EM_COMMON
git-svn-id: https://svn-wrf-model.cgd.ucar.edu/trunk@6227 b0b5d27b-6f0f-0410-a2a3-cb1e977edc3d