Added dropshadows
Fixed identity margin, Color less random
Added PropertiesManager class which manages our configuration, fixed
missing identity after hiding and showing replies again
added aldeon.conf to gitignore
Merge branch 'feature-gui-identities' into develop

Conflicts:
	src/main/java/org/aldeon/app/Main.java
	src/main/java/org/aldeon/core/BaseCore.java
	src/main/java/org/aldeon/gui/controllers/TopicMsgsController.java