* created new AccumulatingReporterBase class for accumulating test
results hierarchically and store them for a single processResults() call
after all tests have been executed; sections are currently not handled,
since their usage are optional and/or could be nested arbitrarily, which
would result in overly complex code, IMHO
* JunitReporter reimplemented on top of this new
AccumulatingReporterBase class
* added support for tracking time spend in each test case, each test
group, and overall tests to the base "*Stats" classes; this enables each
reporter (derived from IStreamingReporter interface) to report the
timings; for now only the JunitReporter takes advantage of that.
className is passed through from class based test methods and held in the TestCaseInfo.
For free-function based test cases it is set to "global".
The JUnit reporter uses the className value to populate he class attribute.
Some files had include guards that didn't match the file name, and
others were missing the include guards entirely.
Standardized this so that every include file has an include guard, and
all the guards are of the form TWOBLUECUBES_<FILENAME>_<EXT>_INCLUDED
If a test case with the same name as an already registered test case is registered an error is logged to cerr and the program exits (with error level 1)
