Make the curl response and status code available from the thrown Exception in SwordAppClient->deposit()

[ashepherd]

Exception: Error parsing error document (String could not be parsed as XML) in SWORDAPPClient->deposit() (line 135 of /Applications/MAMP/bco-dmo.org/www.bco-dmo.org/drupal/docroot/sites/all/libraries/swordapp-php-library/swordappclient.php).

[ashepherd]

I'll fork and submit a pull request