The Unit Test Framework example 1

Rationale:	this simple introductory example demonstrate several basic concepts of the unit test framework: usage of init_unit_test_framework to create and initialize test suite test case creation based on free function usage of basic test tools in test case usage of "number of expected failures" feature
Input:	This example does not require any input
Output:	Running 1 test case... .../unit_test_example1.cpp(17): error in "free_test_function": test 2 == 1 failed *** No errors detected
Source:	unit_test_example1.cpp