v1.4
What's new -- v1.4
Restructured loan model: Removed date from the loan model, update loan amount values
Modified add command: Update condition for where two loans cannot have the same name
Added increase command: Increase the total value an individual has loaned
Added sort command: Sort people by the amount they have loaned, in decreasing order
Updated document: Updated some of the documentation on the website
Updated UI: Updated UI styling
