add roadmap to the readme

README.md

@@ -106,3 +106,20 @@ func main() {
 	term.InvokeCtrlSequence(cs)
 }
 ```
+
+## Roadmap
+
+- Optimize the mapping of new character sets to codepoint ranges when
+  shifting sets in.
+- Build an equivalency table for a wider array of Unicode characters to
+  find characters in the terminal's repetoire that are visually similar enough
+  to use instead.
+- Support loading, and invoking soft (down-line-loadable) Character
+  Sets (fonts)
+- Support creating arbitrary sixels for use in Soft Character Sets.
+- Have write method more intelligently determine when to lock-shift or
+  designate character sets into the graphic registers based on what would be
+  most efficient for the given string to print.
+- Add more helper-functions for standard control sequences.
+- Support VT100 and more.
+- Support 7-bit mode.