Trivial Wrapper Around $EDITOR for Use with cscope(1) inside tmux/screen sessions

Usage:

1. Start a tmux or screen session

2. Set CSCOPE_EDITOR

$ export CSCOPE_EDITOR=$HOME/bin/cscope_editor

3. Start cscope

$ cscope -Rqk

4. When you choose to edit a file in the cscope UI you'll get $EDITOR in a new window in your tmux/screen session.