added using std::vector and replaced "std::vector" to "vector" everywhere
added getNumberOfElementsToCopyFromVector() and
setElementsFromVector() methods definitions
added test case AllCases to TEST(TestMatrixGetElementsToCopyFromVector test
in setRowsNumber() method replaced "std::vector" to "vector"
added friend function operator<<() and it's definition
added test case VectorWith5Elements to
TestMatrixSetElementsFromVector test