#287: load_dataset.php, change 'file_content' -> 'file_pointer'
#287: load_dataset.php, change 'file_pointer' -> 'file_temp'
#287: load_dataset.php, minor comment on 'file_temp' variable
Merge pull request #288 from jeff1evesque/php_load_dataset

#287: Change 'file_content' to 'file_temp'