added timeout response (status 408)

+ added EPOLLERR and EPOLLHUP handling
+ fix root substitution for default "/" location (temp or permanent ?)
+ tested siege a little, seems good

Makefile

@@ -23,7 +23,7 @@ SRCS		 =	main.cpp \
 				base.cpp init.cpp close.cpp epoll_update.cpp signal.cpp \
 				accept.cpp request.cpp response.cpp \
 				method_get.cpp method_post.cpp method_delete.cpp \
-				run_loop.cpp \
+				run_loop.cpp timeout.cpp \
 				parser.cpp \
 				extraConfig.cpp \
 				postProcessing.cpp \