Change back to ANFMAKE for more testing
Add missing gitignore
Re-org python data dir
Override xpy extension rules for ANFMAKE

Set up new include rules for xpy files so that the $ANF python paths get
added automatically.

For ANT-250
Fix problems with default pf handling

Per CEUSN-90, some variables changed internally and were causing a
traceback to occur instead of an error message being printed.

Also fixed the default parameter file, was db2jons instead of db2json
Migrate code to parse headers defined in a schema dictionary.
Merge branch 'master' of https://github.com/UCSD-ANF/anfsrc

Pull changes before pushing.
Parse SEG-D data headers.