Calculator #1
Added second task
Sandrikova Maria, 296, Calculator

Initial commit
Shell version 1
Added Shell back on.
Added shell-specific exception class.
Calculator. Nikolai 296
Calculator. Minor fix.
Calculator, fixed version 2
Added synchronizing with double checker for ShellReceiver singleton.
[Shell] Modified IO restrictions.
[Shell] Replaced Vector usages with ArrayList.
[Shell] Refactored 'cd' command implementation.
First commit, Drozdowsky
shell ver.1
Переназвал переменные, класс исключений. Настроил Eclipse и, нашёл случайно затесавшийся ! который приводил к ошибке.
Просто убрал комментарий
Калькулятор

Внес исправления
[Shell] Fixed exception type.
[Shell] Merging arguments for cmd launch to let single command components be passed as different arguments.