fixup! [enh] #111 : create compute_amounts() function * Uses a list of user...

fixup! [enh] #111 : create compute_amounts() function * Uses a list of user amounts and a multiplicator (should be CENT_MULT_TO_UNIT or UD_Value). * Multiplies the given amounts(UD) to get usable int() amounts for Duniter. * Makes sure that each amountUD is superior to the minimal amount.     * Absolute amounts are in FloatRange(MINIMAL_AMOUNT), so they have already been checked.     * This check should be updated when solving issue #306 / DUBP v13. * Returns list of amounts.

- Do the check after the generation of the amount list
- Change conditions to be more precise and easier to read
- Rename variable to UDs_amounts
- Remove useless commas