Added some tests and partially implement addCommand
Merge pull request #2 from mikelimantara/working

Added some tests and partially implement addCommand
Add EditCommand, DeleteCommand, DisplayCommand minimally for parser to use
Merge pull request #5 from mikelimantara/master

Add EditCommand, DeleteCommand, DisplayCommand minimally for parser to u...
Implemented IParser as Parser. Removed all references to JDK Calendar with own Date class.
Merge branch 'working' of https://github.com/andhieka/LIST into working
updated readme