Added comments to script and adjusted it to python Style guide
Added comments to script and adjusted it to python Style guide

- added several comments to the scripts
- Moved all script parts below the function declaration
- moved parts from load_to_database_comulated to process_file
- added relevant print messages

AMOSus/amos-ss16-proj6,AMOSus/amos-ss16-proj6,AMOSus/amos-ss16-proj6,AMOSus/amos-ss16-proj6