Maintenance release. Highlights:

• JDCP-61: Removed dependency on commons-io.

• JDCP-52: Client-side dead connection detection is now active
  whenever the ENABLE_NOOP control param is set to true.
  (Previously only the server detected dead connections.)

<dependency>
    <groupId>com.couchbase.client</groupId>
    <artifactId>dcp-client</artifactId>
    <version>0.12.0</version>
</dependency>