Data would all be lowercase + fix setup + update data pipeline

[mithi]

1. Tower names, ability names, descriptions, are now all stored in lowercase in the database.
   The graphql query arguments will be converted to lower case first before we use them to query
   the database. Updated all tests accordingly.
   Solves: Make all ability names, tower names, ability descriptions all lower case before storing in json or in the table #79

2. Fix data saving pipeline

• Improve code format of scripts
• Drop database and user if they exist before creating them
• The data saving pipeline was incorrect, we won't be able to resave the data since the current seed/populate.js only allows for inserts and not updates. In the future, I might change this, but since the data isn't that much anyway, the current implementation is that the user is dropped and recreated and all the data are populated all over again
  Improve data saving pipeline #43