Stub-out a new API for storing array attribute data.
Fixing bug where PIModel would not load when rating or category columns were undefined.
Fixing problem with wrong rows selected after updating values in a column that is currently used for sorting.
Merge branch 'master' into file_perm_handling_over_ssh
correction to handle special chars in csv file str
Merge branch 'master' into file_perm_handling_over_ssh
make sure the file exists before using the path in a command, also make sure it's a permission issue before checking the permissions
remote file handling tests to ensure properly handling of exceptions