Merge branch 'master' of github.com:sketchfab/wordpress-plugin

git-svn-id: http://plugins.svn.wordpress.org/sketchfab-viewer/trunk@833416 b8457f37-d9ea-0310-8a92-e5e31aec5664
Sets https by default in embed code

git-svn-id: http://plugins.svn.wordpress.org/sketchfab-viewer/trunk@833419 b8457f37-d9ea-0310-8a92-e5e31aec5664
Merge branch 'master' of github.com:sketchfab/wordpress-plugin
Updates changelog and version