Only to be used on header's values which support quality value syntax
A few things to keep in mind when using this function: * The resulting
Int will be anywhere from 1000 to 0 ("1" = 1000, "0.6" = 600,
"0.025" = 25) * The absence of a Q value will result in 'Just 1000' *
A bad parse of the Q value will result in a
Nothing, e.g. * Q
value has more than 3 digits behind the dot * Q value is missing * Q
value is higher than 1 * Q value is not a number