Remove ATTR_GFX and tselcs

ATTR_GFX was used long time ago to detect when terminal was in
graphic mode. Today graphic mode is implemented using a charset
pointer, so ATTR_GFX is not needed anymore because graphic
condition can be detected directly checking if current charset
is GRAPHICS C0.
Fix displaying control code

Control code are never displayed. It is not important if graphic
charset is displayed or not.
added .gitignore file
initial commit of my config.h
added commented out Terminus font option
merged in changes to config.def.h
just track config.def.h
symlinked config.def.h to config.h
changed default font to DejaVu Sans Mono for Powerline