added log4j2 configurationfile
Merge pull request #79 from hartmannaf/log4jconfig

added log4j2 configurationfile
Added QblKeyFactory for easy recreation of keys with modulus and exponents
update class diagram
Improved DropListenerTest
The test now checks if the expected number of DropListeners is called
and if DropListeners for other ModelObjects remain uncalled
Merge pull request #86 from L-Henke/ImprovedDropListenerTest

Improved DropListenerTest
Merge pull request #84 from k-c13/uml-class-diagram

update class diagram
* removed bidirectional associations of config classes
* corrected config class structure in general
* changed ConfigSerializationTest to adapt the new class structure
corrected comments of class associations
Added BlockingQueue to DropController
Merge pull request #80 from L-Henke/QblKeyFactory

Nice work. Thanks
Merge pull request #90 from f-porter/Issue69-Fix-Config-Class-Structure

Corrected config class structure
ModuleManager: rename initModule() to startModule()
ModuleManager:

Modules are now started in their own background thread. They must make sure,
that they lock configs by itself to avoid race conditions.
Merge pull request #81 from Gottox/master

ModuleManager
Removed onDropEvent interface from DropListener
Added Javadoc to DropController
Delete core.png (qabel-core issue #67)
Merge pull request #95 from k-c13/uml-class-diagram

Delete core diagram img
Ignore the log directory