- Added class consts OPT_SHORT = 0, OPT_LONG, OPT_TYPE, OPT_DESC, OPT_DEFVAL - Changed all instances of $option[<num>] where 0 was the short value, 1 the long value, etc. to use the global consts   for better code readabily and to make modifications/additions easier. Also adds the posibility of using keys instead   of indexes with only minor modifications. - There are some issues with the way completeOptionsArray() reads due to implementing consts (since not all opts are   required, OPT_SHORT can really reference the long opt, etc.). Ideas?
- Added class consts OPT_SHORT = 0, OPT_LONG, OPT_TYPE, OPT_DESC, OPT_DEFVAL
- Changed all instances of $option[<num>] where 0 was the short value, 1 the long value, etc. to use the global consts
  for better code readabily and to make modifications/additions easier. Also adds the posibility of using keys instead
  of indexes with only minor modifications.
- There are some issues with the way completeOptionsArray() reads due to implementing consts (since not all opts are
  required, OPT_SHORT can really reference the long opt, etc.). Ideas?

xinc-develop/xinc-getopt,getopt-php/getopt-php,ulrichsg/getopt-php,mbaynton/getopt-php