Fix #1

In behavior on-out there is a line defining filename as
```clojurescript
filename (files/join (:cwd @this) (:Input loc))
```
And obviously debug shows that ```(:cwd @this)``` is a working directory and ```(:Input loc)``` is a _full_ filename.
I've changed this to just
```
filename (:Input loc)
```
and it works for me.