Update to core
Added client and server
Added license information
Merge pull request #1 from wealdtech/feature/init

Init.
Set up gradle build to allow for Sonatype deployment
Tidied up Hawk javadoc and code coverage
Merge pull request #2 from wealdtech/feature/deploy

Deploy.
Start of work to handle timestamp windows
Set up for jersey authentication filter
Work on jersey server-side implementation
tidy-ups
Tidy-ups
Additional Jersey features
Moved to Jetty for test server
Sorted out Jersey authentication filter
Added license and additional documentation
Added Hawk header for unauthorized requests
Now checks nonces for uniqueness
Added server configuration module
Tidy-up of packages