Reorganization in add file, put/get meta contexts.
Forgot, see last commit.
started refactoring of context objects
refactoring of register process
refactoring of login process
Refactoring of user profile task process.
Renamed the notification context.
simplified common process steps.
forgot to append
adapted tests
adapted isRegistered process
fixed download process
fixed add file process
initializeMetaUpdate is now a common process step
forgotten interface
some adapted contexts
delete file process refactored
notify process
logout process
log fix in FuturePutListener