add up to 10 task compat for interpreter
add persistent add and delete functions
add zombiemail declaration
Merge branch 'UI'
updated update and done
enable undo redo for update
Merge remote-tracking branch 'origin/master'

Conflicts:
	src/zombietask/ZombieTaskCommandHandler.java
Merge branch 'master' into mainlogic

Conflicts:
	src/zombietask/ZombieTaskCommandHandler.java
Merge branch 'UI' into mainlogic
fixed error of dates in location and tags
Merge remote-tracking branch 'origin/master'
latest semi-stable v0.4
update help command
update delete functions for undo
Merge branch 'mainlogic'
enabled undo for update
update updates location
add clashed tasks notification during add command
edit undo text
change error in timedTask colour
Edit location help
edit search function
Enabled monthly perspective