Can't create a suite without set_up and tear_down #5
Description
The readme says:
It is possible to define a suite without specifying set_up or tear_down methods.
I tried to do that using the following code:
LT_BEGIN_SUITE(example_suite)
LT_END_SUITE(example_suite)
That gave me compile errors at littletest.hpp lines 367 and 372, because set_up and tear_down are not defined in example_suite.
Providing no-op implementations in the base class suite fixes the errors, and still allows suites to define custom set_up/tear_down if required.