Новое задание: MultiFileHashMap
Some bugfix
Merge remote-tracking branch 'remotes/origin/FileMap' into MutiFileHashMap
Merge branch 'FileMap' into MutiFileHashMap

Conflicts:
	src/ru/fizteh/fivt/students/AlexeyZhuravlev/filemap/ListCommand.java
+some additions in MitiFileMap for some new FileMap interfaces
+some additions in MitiFileMap for some new FileMap interfaces
Some new MultiFileMap interfaces
Create working directory if if doesn't exist
Deleted empty command output
Merge pull request #215 from AlexeyZhuravlev/MutiFileHashMap

Журавлев Алексей, 394, MultiFileHashMap