Upgrade license to LGPL version 3.0 or later.
Add RSA keygen example using WebCrypto Api
map JWK parameters to local BigInteger
Refactor key generation to use callback
* TODO: reactive native web crypto in rsa.js:142
* TODO: generate publicExponent Uint8Array from argument E in rsa.js:148
* TODO: signing with generated web crypto key fails with "Could not find valid key packet for signing in key"