open remote files with open-uri, remove file deletion from rescue block
open remote files with open-uri, remove file deletion from rescue block

UM-USElab/gradecraft-development,UM-USElab/gradecraft-development,zqian/gradecraft-development,zqian/gradecraft-development,UM-USElab/gradecraft-development,zqian/gradecraft-development,peterkshultz/gradecraft-development,mkoon/gradecraft-development,UM-USElab/gradecraft-development,mkoon/gradecraft-development,mkoon/gradecraft-development,peterkshultz/gradecraft-development,peterkshultz/gradecraft-development