FIX: Convert to UTF-8 with Signature*

EmEditor macro.jsee files are UTF-16LE with Signature*
But Git corrupts UTF-16 files (#2)

EmEditor seems to more or less accept that I force
this macro file to UTF-8 with Signature*

* Signature = byte order mark = BOM
  Without it, EmEditor corrupts the macro

BTW it's great because it will allow Git diff to work OK #2