Read ASEG-GDF description file

[a2ray]

Generate hdr file like GA-AEM produces which looks like

1   fiducial
2   line
3   flight
4   datetime
5   date
6   utc_time
.
.
.

[NMoghaddam]

A function to read the *.dfn file and generate header file in Julia is now available to meet the requirement for the next issue i.e. "using string from header file instead of column number".

[a2ray]

closed by f403771caf1a2ec33491cd558a6c12120393b070

[a2ray]

Unfortunately cumulative column numbers are required after dumping the TRNS and PROJ records, and getting the number of columns per record from the fortran numeric specifier just after the first : after the first ;