* Added crypto project and decoupled BitcoinSLogger from NetworkElement
Decoupled BitcoinSLogger from Factory
Moved NetworkElement into crypto project
Moved Factory and BitcoinSUtil (renamed to BytesUtil) to crypto project
Moved MaskedToString to crypto project
Added BytesUtil to imports and cleaned up CryptoUtil.recoverPoint
Moved the rest of crypto stuff to the crypto project
Moved crypto tests to crypto-test project
* Added documentation for crypto project
* Rebased secp onto bitcoin-core's master (see https://github.com/bitcoin-s/secp256k1/pull/3) and built linux binaries
* Wrote a doc on adding to jni
* Built for website
* Added build instructions for other OSs
* Added table of contents using doctoc
* Edited .gitmodules
* Added windows binaries
* Updated secp branch
* Added osx binaries
* Added make check-java to doc
* Fixed typo