Trove-query-parser

Fix for the following changes in the v3 API:

- `word` facet is now `wordCount`
- `illtype` facet is now `illustrationType`

Adds support for version 3 of the Trove API.

- to generate query parameters for a v3 query add `3` as a second parameter to `parse_query()`
- the default version is `2` for backwards compatibility

Initial release