amended delete to parse line codes: d1, f1, t1
Commit unstable code
- Change ArrayList<Task> parsing to TaskUIFormat parsing
- Edit functions to reflect new changes
- Remove decpreciated functions in UI
- Storage to segregate tasks into 3 types
- Add functions in Storage/StorageAPI
Merge branch 'parser' into mainlogic
Merge branch 'parserdelete' into mainlogic

Add endTime functionality to addCommand in ZombieLogicCommandHandler

Conflicts:
	src/interpreter/Interpreter.java
unstable code
use as you wish
added location for parser, updated tests:
- no longer test view calendar
- can now add location with '<' prefix
- case-insensitivity tested for arguments of 'view'