Implement proper line drawing with Framebuffer::line into Xterm instead of using Unicode characters.
Implement proper line drawing with Framebuffer::line into Xterm instead of using Unicode characters.

jmolloy/pedigree,jmolloy/pedigree,jmolloy/pedigree,jmolloy/pedigree,jmolloy/pedigree,jmolloy/pedigree,jmolloy/pedigree