add FileSystemRepo, mod UploadCsarService fix #79 #71
saveToFileSystem returns fileName instead of boolean

CsarFile: moved hashField to FileSystem
renamed fileSystemForeignId

FileSystem: added new field: hash

FileSystemRepository:
inital creation ref #71

UploadCsarService:
now uses hashes and FileSystem
renamed FileSystem to HashedFile
fix mapping bug
Merge pull request #90 from eiselems/79

implemented FileSystemRepository and extended UploadCsarService, fixes #79 #71

saveToFileSystem returns fileName instead of boolean

CsarFile: moved hashField to FileSystem
renamed fileSystemForeignId

FileSystem: added new field: hash

FileSystemRepository:
inital creation ref #71

UploadCsarService:
now uses hashes and FileSystem