Final release for PHI

Final release for CS2103T iP project.
v2.1.3

v2.1.0

Polished release featuring GUI instead of CLI, improved in-app guidance and a lot more code cleanup

v1.1.1

Included a 'find' feature as well as a lot of internal restructuring and code cleanup.

v1.0.0

First release of code packaged as a JAR file (created with Gradle)