Vectorize bulk formulas
Existing bulk formulas will now require numpy arrays as input.
Usage:
from windeval.processing import BulkFormula as BF
U = rho = u = T_s = T_a= np.array([[1,1],[2,2]])
BF("large_and_pond_1981").calculate(U=U, rho=rho, u=u)
BF("trenberth_etal_1990").calculate(U=U, rho=rho, u=u)
BF("yelland_and_taylor_1996").calculate(U=U, rho=rho, u=u)
BF("kara_etal_2000").calculate(U=U, rho=rho, u=u, T_s=T_s, T_a=T_a)
BF("large_and_yeager_2004").calculate(U=U, rho=rho, u=u)
BF("ncep_ncar_2007").calculate(U=U, rho=rho, u=u) # == BF().calculate(U=U, rho=rho, u=u)