Fixed inconsistent and trailing whitespace

This means that all tabs used in indentation are now 4 spaces and that
there should be no more trailing whitespace.

Ill also look into creating a pre-commit hook that will prevent this
from happening in the future.

Fixes #105

include/internal/catch_interfaces_reporter.h

@@ -248,7 +248,7 @@ namespace Catch
         virtual void testRunEnded( TestRunStats const& testRunStats ) = 0;
 
         virtual void skipTest( TestCaseInfo const& testInfo ) = 0;
-        
+
         virtual MultipleReporters* tryAsMulti() { return CATCH_NULL; }
     };