pom file cleanup
Merge remote-tracking branch 'origin/master' into osgi-module
Remove unused class
API to receive asynchronous responses
Default LwM2m server will now wait until all retransmissions failed before timing out.
release 0.1.4
next release cyle
Started DTLS support.

For now a second port is bound and you are supposed to use an hardcoded
PSK key.

To come: API and UI for setting PSK.
Use californium from central
Merge remote-tracking branch 'ourfork/osgi-module' into osgi-module
Merge remote-tracking branch 'origin/master' into osgi-module

Conflicts:
	pom.xml
Update leshan version to 0.1.5-SNAPSHOT, introduce DTLS support