first commit
WIP
Implemented _create_entry function.
WIP:before refactoring
Refactored data structures, logging function.
Refactored data structures, logging function.
Shortend setattr function.
Implemented rename function.
Implemented symlink and readlink function.
Implemented forget, link function.
Marged conflict.
Add logger to link method.
Marged regular file data and symlink data.
Made testfs utils.
Removed stupid bug.
Almost all ContentBuffer was implemented, except about child elements.
Inserted missing setattr func.
Evolved form tmpfs to permanentfs.
Marged FileIO branch.
Refactored.