Merge pull request #41 from eiselems/19

first implementation of UploadCsarService, needs to be extended, refs #19
implemented list csar service, fixes #22
add CsarFile to hibernate.cfg.xml
fix FileSystem refs #44
Merge pull request #46 from eiselems/45

add CsarFile to hibernate.cfg.xml, fixes #45
Merge pull request #43 from przytads/22

implemented list csar service, fixes #22
Merge pull request #47 from eiselems/44

fix FileSystem refs #44
Reimplemented DownloadService, refs #20
Merge pull request #48 from TKosch/20

Reimplemented DownloadService, fixes #20
Refactored hibernate model and extended with annotations. Used UTC in
hibernate cfg as standard timezone, refs #49
Removed unused methods and made field names consistent
Merge pull request #50 from TKosch/49

Annotated hibernate model and refactored it, fixes #49
change from FileInputStream to InputStream

*other services will usually supply an InputStream