Fix parsing of stack frame information with OCaml 4.01.
Make the sash coloured something other than white so users know it's a split window. This is kinda ugly, but better than invisible.
Make the toplevel's behaviour more like consoles in Web browsers: enter will always evaluate the current expression; press Shift+Enter to add a newline.
Automatically add the toplevel delimiter if the user did not put one, and hit enter.
Implement up and down arrow toplevel history navigation. Works even for multiple lines, like in web browser consoles.
After changing the input from history, set the cursor to the end of the input field.
Fix the Makefile target with new versions of make.