Warn an execution request without main() function (close gh-77).
Show status even though compilation/link succeeds (close gh-75).
Add c++1y option to web interface (ref gh-81).
Use PPA also for clang-3.0 (close gh-79).
Update gcc-4.8 (close gh-80).
Add clang-3.3 (close gh-78).
Add c++1y configuration (close gh-81).