Portfolio form of cash flow amounts

`[`

computes a vector of all cash flow dates of a bond portfolio, and a matrix mapping
the cash flows of each bond to those dates. Use the matrix for pricing the bonds
against a curve of discount factors.`CFBondDate`

,`AllDates`

,`AllTF`

,`IndByBond`

] = cfport(`CFlowAmounts`

,`CFlowDates`

)