updated API, model view pattern

modified api, better performance. Model class.
fuck eclipse files.
Merge branch 'master' of https://github.com/ese-unibe-ch/ese2013-team7
cnflickts
Conflicts:
	Programming/.metadata/.log
	Programming/.metadata/.plugins/org.eclipse.cdt.core/.log
	Programming/.metadata/.plugins/org.eclipse.core.resources/.projects/Mensa@Unibe/.indexes/properties.index
	Programming/.metadata/.plugins/org.eclipse.core.resources/.safetable/org.eclipse.core.resources
	Programming/.metadata/.plugins/org.eclipse.core.runtime/.settings/com.android.ide.eclipse.adt.prefs
	Programming/.metadata/.plugins/org.eclipse.core.runtime/.settings/com.android.ide.eclipse.ddms.prefs
	Programming/.metadata/.plugins/org.eclipse.core.runtime/.settings/org.eclipse.jdt.launching.prefs
	Programming/.metadata/.plugins/org.eclipse.core.runtime/.settings/org.eclipse.jdt.ui.prefs
	Programming/.metadata/.plugins/org.eclipse.debug.core/.launches/Mensa_Unibe.launch
	Programming/.metadata/.plugins/org.eclipse.e4.workbench/workbench.xmi
	Programming/.metadata/.plugins/org.eclipse.jdt.core/4199442320.index
	Programming/.metadata/.plugins/org.eclipse.jdt.core/savedIndexNames.txt
	Programming/.metadata/.plugins/org.eclipse.jdt.ui/QualifiedTypeNameHistory.xml
	Programming/.metadata/.plugins/org.eclipse.jdt.ui/dialog_settings.xml
	Programming/.metadata/.plugins/org.eclipse.ui.workbench/workingsets.xml
	Programming/Mensa@Unibe/bin/Mensa@Unibe.apk
	Programming/Mensa@Unibe/bin/classes.dex
	Programming/Mensa@Unibe/bin/resources.ap_