two suggestions aliases for QString: 'rightFrom' and 'between' methods

Hi,

currently there is method

QString.mid(n);

that returns QString with characters from n-th until last one.

It might be nice to alias this to:

QString.rightFrom(n).

It took me a long time to figure out mid can accept only one number, and now I use mid regularly, but I see that code would look much nicer if method had rightFrom name. Mid means in the middle, not on the right side.

Also, It might be useful to get

QString.between(n, m)

this method could always take two arguments, and m has to be higher than n.
this function could return same as QString.mid(n, m-n).

This two can be lived without, but they could potentially make code look much nicer and easier to read.

I also use mid(n, m-n) a lot, but in most cases m and n are some really long methods, mostly n is QString.indexof(... , ...), and in most cases I do not create specialized local variable n for it, which makes function mostly like this:

QString.mid(QString.indexof(ref1, arg1), QString.indexOf(ref2, arg2) - QString.indexof(re1, arg1));

which is long and ugly. It would be (little bit) better and easier to read like this:

QString.between(QString.indexof(ref1, arg1), QString.indexOf(ref2, arg2));

Regards,
Petar