* Move CryptoParams to shared crypto project, make BouncyCastleCryptoParams for bouncy castle specific things
* Rework build structure to work better with scalajs
* Add unit test to make sure CryptoParams & BouncyCastleCryptoParams are consistent
- separate Java source copied from libsecp256k1 into separate module
- split main module into core core-gen core-test
- generators can be published separated to core code for use in
3rd-party tests
- code coverage needs to be aggregated
