Shell added
Updated shell
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shell: fixed some cp and rm problems
Merge pull request #47 from DuXeN0N/master

Shell. Андрей Саитгалин 297
shell: cp
Fixed cp and mv commands.
Merge pull request #39 from ignorer/master

Кисленко Александр, группа 297. Задание №2: "Shell".
Merge pull request #42 from abelousova/master

Shell, Белоусова Александра, 297 группа.
Shell. Kirill Fedoseev 296
Corrected exceptions` messages in "mv" a little.
Corrected a little more.
Updated Shell
Revert 4332cbd..26aaed5

This rolls back to commit 4332cbd78390299a48c8dd975fe2eb680148af25.
shell: mv
checkstyle...
Fixed command parent classes and some bugs in interactive mode.
Fixed command parent classes and some bugs in interactive mode.