stop actors when connection fails
packager actors named
Unreachable message no longer includes Throwable

The Throwable may contains ActorRefs that are not necessarily 
understandable by the other side.
provider actor properly named
Destroyed message implemented

IsAlive/Unreachable was not sufficient to cleanup all packagers in a 
timely fashion. The dispatcher is now watching all actors receiving
messages in order to be able to inform the peer about terminated actors.
ssl re-enabled
reconnecting fixed
Merge pull request #22 from IDgis/protocol-fixes

Protocol fixes
logback implemented
log.warning -> log.debug
alternateTitle added to warning
table name determination improved
info logging added
source dataset name length increased (80 -> 200)
column update fixed
conformed to LoggingAdapter convention
initial version of loader implemented

also contains additional improvements:

- deegree dependencies exclusions
- requesting single metadata item from provider
Merge pull request #24 from IDgis/logging_and_loader

Logging and initial loader implementation
enable database access
link to SourceDatasets in dashboard