updated description of compoenents

README.md

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 # unittest-mocking
-Mocking practices using Moq in Microsoft unit test framework
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+This solution contains below components.
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+Contracts: All entities, enums will be part of this component.
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+Repositories: This component contains all Repositories including IRepository interface. All repositories implementing IRepository interface. This component is responsible to connect with Data component. 
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+Services: This component is responsible to contain all business logic.
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+Services.Interfaces: This component contains interfaces related to services. So service can implement respective interface. This can be used for DI.
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+Services.UnitTests: This components having all unit tests. This component contains unit tests related to our services. 
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