Add support for 256-colors terms.
Add support for 256-colors terms.

GuillaumeDievart/atoum,mageekguy/atoum,Tiross/atoum,agallou/atoum,vonglasow/atoum,vonglasow/atoum,mageekguy/atoum,mikaelrandy/atoum,gpaton/atoum,mikaelrandy/atoum,jubianchi/atoum,CedCannes/atoum,agallou/atoum,GuillaumeDievart/atoum,tejerka/atoum,Tiross/atoum,jubianchi/atoum,CedCannes/atoum,tejerka/atoum,gpaton/atoum