Crate virvadb

Functions

• delete
  delete element in your database in a given position ;automaticaly skip if the position did’int exist
• delete_all
  delete all element in the database
• get_db
  return your database ; will panic if database don’t exist
• insert
  insert new element in the database
• new
  Create a new database ; automaticly skip if the db already exist
• update
  update element in your database