Check sessionId before adding handler to map

Change-Id: Id912c845f38ec3f6e088b3ba9e850e360a915fc8
Include KurentoException where needed

Change-Id: I78df777d81eeff2db63c8244e91225aead2f1a7d
Pointer detector receives a list of windows

Change-Id: I0c9549e9bc0d0e62e7615acdeb8b9173b22db238
Add implementation for SdpEndpointImpl

Change-Id: Iaa59c7deaf3e113981c279367dd6edfe0d872bb6