Brendan Ward f911f03053 use internal png ...

fix travis config error

try libpng14

try libpnglite

now try zlib

now try zlib both arch

now try png internal

2017-09-12 05:41:07 -07:00

..

travis_gdal_install.sh

use internal png

2017-09-12 05:41:07 -07:00