adds guava library and uses tree import
ignores .idea folder
changes some meta information files. removes .idea from version control
creates basic list view for events. Much more layouting needed
removes IntelliJ files from version control
adds track indicator to list view
Merge remote-tracking branch 'origin/131217_ms_basic_talk_list'

Conflicts:
	Fahrplan30c3/src/main/java/com/mtrstudios/Fahrplan30c3/Data/Event.java
Basic Talk List