Add additional route for simple queries with defaults

Allows queries like `GET /id/9783458171652`, `GET /author/Abramson`
(index defaults to `lobid-index`, result defaults to `page`, can
both be specified additionally, see sample on index page).
Change default result format from `page` to `full`
Merge pull request #39 from fsteeg/routes

Add additional route for simple queries with defaults