ratasm 0.3.0

Changed

• ratasm edits text itself again. The editor has tabs, undo and redo,
  selection, the clipboard, find and replace, go to line and go to definition;
  building saves every file first, F9 toggles a breakpoint on the
  cursor's line, and errors and warnings are shown beside their lines. Running
  $EDITOR inside the panel, and the editor.command and
  editor.line_argument settings, are gone.
• Any folder is a project. Without a .ratasm.toml every .asm file in it is
  built, the entry is the file declaring _start (or main, linked by gcc),
  and files added later are built too. The project root is the nearest folder
  with a .ratasm.toml, a Makefile or a .git.
• Two pages, Code and Debug. Learn and Reference are a study mode that
  F1 enters and leaves; Alt+1 and
  2 move within whichever pair is open. The flags are shown in the
  Registers panel. F2, F3's status details,
  Ctrl+K and Ctrl+Alt+A
  are palette commands now.

Added

• Makefile projects: F6 runs make, its errors are placed beside
  their lines, and the program it builds is found for running and debugging.
  Run a make target runs any other target. ratasm new --make creates one.
• ratasm new --libc: a main that calls printf, linked by gcc; debugging
  stops at main.
• Go to symbol (Ctrl+T) and search in files
  (Alt+F) across the project; find next and previous on
  F3 and Shift+F3, replace on
  Ctrl+R.
• The explorer lists every source, include, Makefile and note, and creates,
  renames, moves and deletes files.
• Files changed on disk are reloaded, or reported when they have unsaved
  changes.
• Conditional breakpoints, watchpoints and register writes.
• Open files and breakpoints are restored per project.
• Six lessons and ten processor-checked questions.
• Shift+F12 stops debugging, and
  Alt+← / → move between panels from
  anywhere.

Fixed

• A program being debugged no longer dies of SIGHUP on its first write after
  continuing or stepping.
• With recording on, a program runs to its exit instead of hanging for 15
  seconds and failing the session.
• Removing, disabling or changing a breakpoint during a session reaches GDB.
• Ctrl+F5 stops a paused debug session.
• The disassembly follows the program counter, branch operands are short and
  name their targets, and the listing no longer runs past the code.
• ratasm run runs the program on the terminal, so it can read input.
• The flags panel groups aliases of the same jump, and the explanation keeps
  the name of the register being written.