clear() => nclear() to fix conflict with core.module.clear()

This is kind of an ugly solution, but we both agree it's better than typing the fully-qualified name every time you want to clear the screen.  A better way would be welcomed.

Author: Llammissar

deimos/ncurses/ncurses.d

@@ -32,3 +32,4 @@
 module deimos.ncurses.ncurses;
 
 public import deimos.ncurses.curses;
+alias deimos.ncurses.curses.clear nclear;