cs2103aug2014-w10-1c/main — pull request #194 by lowjoel (2014-10-14 09:52:47+00:00)
Title: Implement logging framework.

Not hard to use:
```C++
using You::Utils::Log;
Log::debug << L"hello";
Log::debug << f(); // strict
Log::debug << std::bind(&f); // lazy

Log::setActiveLevel(You::Utils::LogSeverity::WARNING);
Log::debug << std::bind(&f); // doesn't get called.
```