Form text matrix from individual strings.

  S = STR2MAT(T1,T2,T3,..) forms the matrix S containing the text

  strings T1,T2,T3,... as rows.  Automatically pads each string with

  spaces in order to form a valid matrix.  Up to 10 text strings 

  can be used to form S.  Each text parameter, Ti, can itself be a 

  string matrix.  This allows the creation of arbitarily large

  string matrices.