ModuleManager: Needs to know about DropController to provide it to the Modules.
Drop: Use Generics instead of Abstract Type.
Merge pull request #110 from Gottox/master

Preparation for pot
send and forget does not use every contact anymore
sync test with reality
collection instead of hashset
added method to send to a single contact; javadoc additions
typo fix
added test for new method
Merge pull request #114 from jan-schreib/send_to_contacts

Fixes #111 and fixes #113
Fixed array initialization with negative size in CrypoUtils
Added regression test

For sending and receiving encryptped / decrypt (non) multi part drop messages.
Merge pull request #119 from L-Henke/negativeArrayBug

Fixed array initialization with negative size in CrypoUtils
Merge pull request #121 from thechauffeur/debug_multipart

Added regression test