v2.1

New changes

• Add help command for the 3 sub menus
• Make each prescriptions and visits unique
• Validate date and time on user input and loading data
• Show more specific error message and redesign the output handling invalid input
• Validate visit date time to be after date of birth

v2.0

Merge pull request #142 from dhanish265/branch-UGPatient

v1.0

Features:

• Support adding, editing, retrieving and listing patient basic informations
• Support adding, editing and listing visit records
• Support adding, editing and listing prescription records