deadline tasks now use end date instead of start date
Merge remote-tracking branch 'origin/parser'
Pass the test case
Change a little bit in ZombieTaskCommandHandler to solve the update
problem for task with two deadlines
Merge branch 'ZombieStorage' into mainlogic
implement search functions
delete all useless file
implement undo method
Merge remote-tracking branch 'origin/ZombieStorage' into ZombieStorage
partial implementation of
-	update help command
-	add clash warning
-	delete depreciated methods
-	add location
Merge branch 'ZombieStorage' into mainlogic

Conflicts:
	ZombieLog.0.0.txt
	ZombieLog.1.0.txt
	ZombieLog.1.1.txt
	ZombieLog.2.0.txt
	ZombieLog.3.0.txt
	ZombieStorage.txt
update viewagenda and taskclash functions
Merge branch 'mainlogic' into ZombieStorage
Added integration tests, empty classes
Merge branch 'master' into ZombieStorage
implement redo method
added function to test commands directly in zombietask
Merge branch 'master' into ZombieStorage
some manual integration testing included
Merge branch 'master' into ZombieStorage