Problems with array ports when parsing several connections in a line

Example of the graph:

```
'test 1' -> IN[0] Mux(mux) OUT[0] -> IN Display(console)
'test 2' -> IN[1] Mux OUT[1] -> IN Display
```

Result:

noflo/fbp/lib/fbp.js:1727
        throw new this.SyntaxError(
              ^
SyntaxError: Expected " " or [a-zA-Z0-9_] but "-" found.

Put a single connection with array ports in a line works fine.
