Seednode and unit test updates

* Make the suppression of deprecation warnings mac-only, was added to
limit the
warning spam since OpenSSL has been deprecated on osx mavericks.
* Updated scrypt unit test to support scryptN (alert and base58 tests
still need to be updated)
* Updated osx makefile
* Added new seednode
* update makeseeds script for vertcoin
* updated gitignore