Patch for /trunk/demo-train-big-model-v1.sh

```
Fixed a couple of bugs:
1. name mismatch with the UMBC-webbase corpus
2. Downloading the phrases dataset
```

Original issue reported on code.google.com by `roys...@gmail.com` on 15 Sep 2014 at 6:42

Attachments:
- [demo-train-big-model-v1.sh.patch](https://storage.googleapis.com/google-code-attachments/word2vec/issue-20/comment-0/demo-train-big-model-v1.sh.patch)
