src:ticket:633

git-svn-id: https://www.myroms.org/svn/src/trunk@727 f091316a-d328-0410-a40a-876eff57d070

Conflicts:
	ROMS/Functionals/analytical.F
	ROMS/Nonlinear/u2dbc_im.F
	ROMS/Nonlinear/v2dbc_im.F
Adding ICE_STRENGTH_QUAD option, take one.