Merge pull request #18 from sosandstrom/master

update the last one
Merge pull request #19 from sosandstrom/master

update
Merge pull request #20 from sosandstrom/master

update from master
specify imageSize to imageService due to default one maximum is 512
Merge pull request #17 from sophea/master

specify imageSize to imageService.getServingUrl() due to default max size is 512