Added .settings/ to .gitignore
Added the mockups to documentation
Added Category object class
Added ListObject object class
Added category variable (and get/set) in ListObject
Added time object class
Added Time to ListObject with get and set
Added new object class Place
Added Place to ListObject with get and set
Added new object class TimeAlarm
Added TimeAlarm to ListObject with get and set
Added new object class GPSAlarm
Added GPSAlarm to ListObject with get and set
Added support for multiple categories
Fixed some trivial conflict
Added structure of the database
Added javadoc to DBHandler (incomplete) and added a TODO to ListObject
Added add methods for all table columns in DBHandler
Fixed conflict
Added a couple of update methods to DBHandler