Merge pull request #11 from lap82/DS-1252-bte

Code formatted with DSpace conventions
The temp file is now unique and the file is correctly deleted

The temporary file is created using the File.createTempFile method to
avoid the potential overwriting if more than one users try to upload a
file simultaneously. Also the file is now deleted in a finally clause
to delete it even if an exception is thrown.
Use properties files for map converters
Merge branch 'DS-1252-bugs' of https://github.com/EKT/DSpace into DS-1252-bugs
Added specific configuration file for submission lookup
Merge branch 'DS-1252-bugs' of https://github.com/EKT/DSpace into DS-1252-bte
Some minor changes, fix retrieve data from crossref response