grass-70: add bottles for mavericks and yosemite
grass-70: add bottles for mavericks and yosemite

Signed-off-by: Larry Shaffer <c14ae11560132dad1914a5ada5004ef35b28377d@dakotacarto.com>

OSGeo/homebrew-osgeo4mac,OSGeo/homebrew-osgeo4mac,OSGeo/homebrew-osgeo4mac