EgorLunichkin.calculator

Added solution for Task1.Calculator
Calculator 1.0.1

Fixed Checkstyle
Added Package name
Calculator 1.0.2

Fixed Checkstyle
Calculator 1.0.3

Small fixes in CalculatorException.java
Calculator 1.0.4

Fixed division
Small fixes in Minus.java
Merge pull request #148 from elunichkin/master

Егор Луничкин, 395, Calculator