Add updated version of [X]Emacs macros.
Use the Mode Lock (= Scroll Lock) key to enable Emacs mode. But allow that to be switched off in local.mk.
Indicate that mode with second LED, if there is one. Similarly allow choosing LEDs in local.mk.
Enhance Emacs mapping to allow for Top+Shift, to get all the braces, etc.
GNU Emacs does not have a backward-kill-line command by default; use macro.
Workaround for Windows and Scroll Lock.
Merge pull request #2 from MMcM/emacs

Add updated version of [X]Emacs macros.