---- femto text editor ----

based on nano.

draws graphics using ANSI control sequences.

this means the terminal must be in raw mode with echo
turned off. the `femto` wrapper script achieves this
using `sttry raw -echo` (it also restores the previous
terminal settings on exit).

you must provide a path to a file when starting femto:

    ./femto femto.tal

the femto launcher script makes many assumptions:

 - uxnasm and uxncli are both in the PATH
 - femto.tal is in the same directory as femto
 - femto.rom should be (re)assembled every time
 - femot.rom should be written in the same directory

once femto is not in active development a more robust
packaging process can be explored.

----- current status -----

 - can't create new directories while saving
 - doesn't support horizontal scrolling for long lines
 - no search (or search&replace)
 - few help messages

----- status line -----

the femto status line contains a lot of information:

 1. if the file has unsaved changes (**) or not (--)
 2. the file name (e.g. "scratch.tal")
 3. the number of bytes/lines (e.g. "[49 bytes, 8 lines]"
 4. the x/y cursor position (e.g. "(1,8)" for col 1, row 8)

----- special key bindings -----

 C-g   cancel
 C-o   save
 C-x   quit

 C-a   go to beginning of line
 C-e   go to end of line

 C-b   move back one character
 C-f   move forward one character
 C-n   move down one line
 C-p   move up one line

 M-v   page up
 C-v   page down

 M-<   go to start of file
 M->   go to end of file
 M-g   go to line (TODO)

 C-l   refresh screen
 C-d   delete

    (C stands for Control)
    (M stands for Meta, often Alt or Option)