There's no LICENSE file. [build.gradle](https://github.com/jpace/diffj/blob/0e71a3e4edb6ec1e572168f665730c3bef6c613a/build.gradle#L24) suggests it is Apache-2.0. The [command line implementation](https://github.com/jpace/diffj/blob/43ce95b7779d777f9dc02cf6ae94d32eff238859/src/main/java/org/incava/diffj/app/DiffJ.java#L129) suggests LGPL. Sorry to be a pain, but would you mind clarifying the license? Thanks!