Alias

- Removal of alias load/resolve code, which (1) needs a rewrite, and (2) belongs
  in the Parser.

src/CMakeLists.txt

@@ -5,8 +5,7 @@ include_directories (${CMAKE_SOURCE_DIR}
                      ${CMAKE_SOURCE_DIR}/src/columns
                      ${TASK_INCLUDE_DIRS})
 
-set (task_SRCS Alias.cpp Alias.h
-               Color.cpp Color.h
+set (task_SRCS Color.cpp Color.h
                Config.cpp Config.h
                Context.cpp Context.h
                DOM.cpp DOM.h