Trying to fix the Wordpress sketch for the new framework.
Merge remote-tracking branch 'upstream/master' into fix_wordpress
Bug fixing

A number of bugs had crept into the wordpress_install sketch when
porting to the new Design Center framework. I've fixed all that I could
find, so that the sketch again runs properly. I also improved and fixed
the sample params/wordpress.json file.
Merge pull request #235 from zzamboni/fix_wordpress

Fix wordpress sketch.