* bstr: simply gives the string
* xbstr: gives string and its length
* lbstr: gives the long value of the item
* ibstr: gives the int value of the item
* havebstr: whether this bstr and if it wasn't set empty
* yesbstr: returns true if the value equals "yes"
there also is a CAPITAL version of each, for dynamicaly calculated keys.
* replaced all atol(bstr()), strcmp(bstr(), "yes") IsEmptyStr(bstr()) by the above.