* write a proper README

* optimize scrolling by using one single linear array for both hist buffer and
  term.line?

* don't malloc-free in treflow, use the same array and use memmove?

* extract patch for scrollback

* send bugfix for tdeletechar and tinsertchar: args to memmove can point beyond
  the array

* send bugfix in handling CSI 'J', case 1: term.c.y > 1 to term.c.y >= 1