Log Message:
Update to latest zyGrib, release notes:

2015-01-18 : zyGrib Version 7.0.0

    Download and display new data GFS from NOAA: grid 0.25°x0.25°
    and up to 10 days forecasts.
    Restriction: for long-term files, only the first 5 days are
    with a grid of 0.25°, beyond the grid is 0.5°.