Fix transposed 'o' and 'w' keys
Update to Elasticsearch 0.90.1
Closes #21.
Merge branch 'patch-1' of https://github.com/merrellb/elasticsearch-river-twitter into merrellb-patch-1
Update copyright
Update to twitter4J 3.0.3 and add test
We move from twitter4J 2.x to 3.x

Note that annotation object does not exist anymore.

By the way, we add a test (main program) with the following parameters:

```
Usage:
    -u, --user     [username]       : Set your twitter user account
    -p, --password [password]       : Set your twitter password
    -d, --duration [duration]       : Set test duration in seconds (default to 10)
    -t, --track    [term]           : Term you want to track (default to obama)
    -h, --help                      : Prints this help message
```

It will be easier to test non regression... ;-)
Closes #22.