Log Message:
update to zyGrib 3.9.9, changelog below

# 2011-01-07 : zyGrib Version 3.9.9

    * Distribution for Mac (Intel): ready to use complete .dmg archive.
    * Bug fixed with Mac version (frequent crash after a download).
    * New module by Polaris (Tim Holtschneider) : curve plot (yet experimental).

# 2010-12-20 : zyGrib Version 3.9.8

    * Download high resolution data from Meteoblue (Switzerland and surroundings).
    * Plot isotherms (actually in Celcius degrees and at 2m above ground).
    * Reverse mouse wheel zoom (same behaviour than the excellent OpenCPN \ 
navigation software).
    * Freeze first column of meteotables (headers).
    * More proxy parameters.
    * New spanish translation by Luis Mederos.
    * Fix some old bugs... create some new bugs...