2005-12-21  Takeshi Enomoto <eno@jamstec.go.jp>
    * grads.ncl (grads_read): Improved the detection of the vertical coordinates
2005-08-18  Takeshi Enomoto <eno@jamstec.go.jp>
    * tdef.awk: Bug fix. n<2 -> n>1
2005-02-25  Takeshi Enomoto <eno@jamstec.go.jp>
    * var*.awk (for-loop): Bug fix. i<n -> i<=n
    * grads.ncl (grads_time): Bug fix. index of tbuf was out-of-range. Now returns an array. 
