* Add ability to publish to bintray, take on the org.scijava native-lib-loader dependenency so we can bundle secp256k1 natively in a jar file and publish. This dependency will allow us to link the correct secp256k1 version dependending on the os and arch in the future
* Add sbt-pgp plugin to sign binaries, modify project names to all have the 'bitcoin-s-' prefix.
* Adding linux 32 bit secp256k1 natives to secp256k1jni project
* Add mising linux_64 binaries
* remove unused symlinks
