Add xvim: simple vim-in-terminal wrapper for Firefox handler

diff --git a/xvim b/xvim
new file mode 100755 (executable)
index 0000000..a3d7680
--- /dev/null
+++ b/xvim
@@ -0,0 +1,2 @@
+#!/bin/sh
+simple-term -bg white -e env TERM=xterm vim "$@"