Implement project Essential_L16.2 (ICloneable)
Add and implement class House.cs. Override method Clone and implement method DeepClone.
Update gitignor

Conflicts:
	.gitignore
	Essential/Essential_L16/Essential_L16.sln
Improve methods Clone and DeepClone.
Update gitignor
Merge pull request #47 from anna-kulyk/L16.2

Implement project Essential_L16.2 (ICloneable)