Added Emoticons, sounds, and fixed some connectivity bugs

Added emoticons 
Added a sound effect for when new messages arrive
Fixed most bugs where the app would crash if the phone was disconnected from the network
Added tests for CreateRoomActivity

Added Files:
res/drawable/*
Emoticonifier.java
CreateRoomActivityTest.java

Modified Files:
res/values/strings.xml
src/activities/*
ChatManager.java