Documentation, usability updates, and removing debug code.

+ First pass at documenting the Buffer class.
+ Starting Arena documentation.
+ Various usability updates, such as overloading operators.
+ Remove debug traces.

Test.cc

@@ -33,10 +33,10 @@ AssertionFailed::AssertionFailed(std::string message) : msg(message)
 }
 
 char *
-AssertionFailed::what() const noexcept
+AssertionFailed::what() 
 {
 	return const_cast<char *>(this->msg.c_str());
 }
 
 
-} // namespace klib
+} // namespace klib