Released Restlet Framework 2.3rc1.
Released Restlet Framework 2.3rc1.
 - Added copyright headers
 - Removed some deprecations
 - Restored StatusInfoHtmlConverter with actual HTML generation (forgot file in previous commit)
 - Updated changes.txt post 2.3 RC1
      - Deprecated org.restlet.Component XML configuration.
	Usage of XML support in Spring extension is recommended instead.
      - Deprecated e4 extension.
	Usage of Guice or Spring extensions is recommended instead.
      - Deprecated JDBC extension.
	Use a persistence technology such as Mybatis or Hibernate instead.
      - Deprecated JiBX and XStream extensions.
        Use an XML serialization technology such as Jackson instead.
      - Deprecated jSSLUtils, ROME, XDB extensions.
	Libraries not actively developed anymore.
      - Deprecated Apache HTTP Client and Simple extensions.
        Will be removed to favor lower-level network extensions such as
        Jetty and Netty, allowing more control at the Restlet API level.
      - Deprecated SIP, WebDAV extensions.
	Will be removed to focus on Web APIs.
Remove code already done in Engine.clearThreadLocalVariables()
Released Restlet Framework 2.3rc1
Update javadoc of DefaultSslContextFactory.trustStorePath. Replace default value null by "System property "javax.net.ssl.trustStore""
Uncomment tests of StatusServiceTestCase and add new tests
Remove debug mode and force JacksonConverter
upgrade gson to 2.3.1
Merge pull request #985 from restlet/update-gson-2.3.1

upgrade gson to 2.3.1
Solved conflicts with changes.txt file.