Implement MbUnit v2-style AutoRunner for Gallio. about mb-unit HOT 8 OPEN

http://www.mertner.com/confluence/display/MbUnit/TestExecutionUsingSelfExecutabl
eTestAssemblies

Also make it simpler as suggested by Jonathan de Halleux:
http://www.mertner.com/jira/browse/MBUNIT-4

The other inconsistencies mentioned in that bug have already been resolved by
combining the console runner with AutoRunner.  We should cut down the 
complexity of
AutoRunner further so that it can run tests "all-in-one-go" but underneath it 
should
be using more or less the same stuff as the console runner.

====

It does not make sense to have the autorunner be so complicated. The user 
should be
able to write something like this to make his assembly executable

class Program
{
    int Main(string[] args)
    {
        return AutoRunner.TestMain(args);
    }
}

The TestMain method would execute the tests. The parameter such as report etc...
would be controlled like the console application. 

The conflicting AutoRunner class in Gallio is gone.

Still need to implement an MbUnit v2-style AutoRunner though.  It could 
probably be 
based on TestLauncher.

There's some stuff in common with Echo here.  It might actually make sense to 
implement AutoRunner as an alternate entry point into Echo.  The user of 
AutoRunner 
would just add a reference to the Gallio.Echo.exe assembly from their projects.