[JUnit] Initial commit with partially stubbed interface implementations ([Shell][FileMap][MultiFileHashMap] Minor architecture fixes).
[JUnit] Created separate package. [FileMap][MultiFileHashMap][JUnit] Major functionality improvements towards JUnit task.
[JUnit] Added some Unit tests. Small bug fixes.
[?] Forgotten files.
[JUnit] Minor functionality bug fixes and refactoring.
[JUnit] Added one more Unit test.
[JUnit] Renamed JUnit class static method according to class name.