Add colored text (not only colored chat).

Add documentation, move files to a proper place and avoid memory leaks.
Make it work with most kind of texts, and allow backgrounds too.

src/client/CMakeLists.txt

@@ -1,6 +1,5 @@
 set(client_SRCS
 	${CMAKE_CURRENT_SOURCE_DIR}/clientlauncher.cpp
-	${CMAKE_CURRENT_SOURCE_DIR}/guiChatConsole.cpp
 	${CMAKE_CURRENT_SOURCE_DIR}/tile.cpp
 	PARENT_SCOPE
 )