Merge pull request #28 from pmienk/develop

Correct pc file, script error.
Merge pull request #29 from libbitcoin/develop

Develop
Update props to reference libbitcoin_protocol.
Headers, namespaces, exports.
Reference protobuf and _client dependencies from VS props.
Rename libbitcoin_protocol to libbitcoin-protocol.
Rename libbitcoin_client to libbitcoin-client.
Modify renamed script attributes.
Revert excessve hyphenation.
Bump version and set dependency version.
Merge pull request #30 from evoskuil/develop

Rename libbitcoin_ to libbitcoin-.