emulation: Add support for C1 control codes
emulation: Add support for C1 control codes

https://bugzilla.gnome.org/show_bug.cgi?id=730154

thestinger/vte-ng,flaxandteal/gasket-vte,rvu95/vte,saitoha/vte-sixel,flaxandteal/gasket-vte,rvu95/vte,flaxandteal/gasket-vte,rvu95/vte,thestinger/vte-ng,rvu95/vte,thestinger/vte-ng,saitoha/vte-sixel,saitoha/vte-sixel,flaxandteal/gasket-vte