A side effect of PR#191

```
st=>start: Start:>http://www.google.com[blank]
e=>end:>http://www.google.com
op1=>operation: My Operation
cond=>condition: Yes
or No?:>http://www.google.com
io=>inputoutput: catch something...

st->op1->cond
cond(yes)->io->e
cond(no)->op1
```
@robertleeplummerjr @adrai The basic example was rendered as follows after [PR#191](https://github.com/adrai/flowchart.js/pull/191) was merged. The 'no' condition draws a line to the top-right instead of right direction, even if I explicitly specify the direction.


Start by reproducing the supplied flowchart example in the demo page and reviewing PR#191, which introduced the side effect. Trace how the `cond(no)->op1` edge direction is selected after that change; done means the no-condition branch renders to the right as explicitly specified, without regressing the other branches.

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