displayMessage

displayMessage(msgStr)
displayMessage(verbose_level, msgStr, p1, ...)
displayMessage(verbose_level, msgStr, p1, ..., ops)

Function displays a message provided as input string, if the verbose
level is matched. If options were not provided, verbose level is compared
to the default one.

Inputs
  verbose_level : input verbose level, shows "importance" of the output
  msgStr        : message string in the format used by fprintf
  p[i]          : additional parameters for the string (see fprintf)
  ops           : valid options object