Add exception hierarchy reflecting resource access problems
Update WriteRequest, ExecRequest to support payloads
Add CreateRequest
Add convenience factory methods to request objects
- Fix problem with parsing CoAP responses without valid content format
- Update Californium to 0.18.5
Add java code-formatter settings
Merge pull request #8 from sophokles73/observe

Thank you very much !

Manu
Add module for OSGi Device Access support
implement client registration in leshan-osgi
incremented californium version, removed Version Range at
leshan.server.lwm2m
implemented postProcessRegisteredClient
- read required Device Resources for osgi-registration after Client sent
a POST request on RegisterResource
registration process is decoupled from the osgi registry
added getter for ConcurrentHashMap ClientsByEp and RegistryListener
added Client Interface, changed Client to ClientImpl which implements
Client Interface.  Client Interface is required in leshan-osgi,
OsgiBasedClientRegistry
refactored clientRegistration because of decoupled registration process
added sonar-maven-plugin
extension of pluginManagement in pom.xml for sonar execution.
reverted pluginmanagement
removed modifier
fix updated artifact id of slf4j adapter for log4j
added postProcessDeregisteredClient and postProcessUpdateClient
dropping registration changes
implement client registration at OSGI registry