changes for termux, print newline after final output

[iftint] / ext / termbox2

diff --git a/ext/termbox2 b/ext/termbox2
new file mode 160000 (submodule)
index 0000000..df4d01b
--- /dev/null
+++ b/ext/termbox2
@@ -0,0 +1 @@
+Subproject commit df4d01bf468853713906cc427c9635380a4c60bb