updates for jetty 9.1
Add the error code into the JSON response

Add the HTTP response code into the JSON error response
Merge pull request #672 from glennmcallister/master

Add Glenn McAllister to developers in parent pom.xml
Merge pull request #666 from jplock/jp-json-error-codes

Add the error code into the JSON response
Cleaning the example after moving to hibernate. README was outdated, also some query was unused
Adding Optional @FormParam injectable. Copy of the functionality already provided by for @QueryParams
fixing imports and removing unnecessary annotation for consumption type
organising import ordering
Fixes #678
Merge pull request #679 from mcarrierastonish/master

Fixes #678
Replace JaCoCo with Cobertura for code-coverage analysis

The JaCoCo Maven plugin currently doesn't support multi-module builds properly.
Cobertura doesn't completely work with Java 8 but at least it produces sensible
results for Dropwizard.
Avoid unnecessary (un-) boxing in Duration and Size (FindBugs)
Upgrade to FindBugs 3.0.0 (Java 8 compatible)
Enhenced Jackson#newObjectMapper to take an custom provided instance of com.fasterxml.jackson.core.JsonFactory. This allows further customizations of the ObjectMapper.
Fix client documentation
Merge pull request #684 from Toilal/docfix

Fix Liquibase example in dropwizard-migrations docs
Added more tests to ensure that Jackson#newObjectMapper can handle null as parameter.
Merge pull request #683 from obfischer/master

Extend `Jackson#newObjectMapper` to take optional `JsonFactory`
Fix Javadoc, refs #683
Merge pull request #675 from anikiej/master

Cleaning dropwizard-example's README.md and removing unused code