Create testmanager.h

Abstraction and managment for unit tests
Create minunit.h

minunit library for testing
Added implementation of testmanager
Added implementation of one test class  - connectionTest
Because the connection is purely abstract class (interface) there was
created mock object ConnectivityMock.
Merge pull request #3 from xjaros1/master

The tests project created (merged from xjaros1/master)