Reorganizing Baron project files and filenames
  * Renamed the following files:
    * bitcoinutil.js -> lib/bitcoinrpc.js
    * invoicehelper.js -> lib/invoices.js
    * paymentutil.js -> lib/payments.js
    * invoicewebhooks.js -> lib/webhooks.js
    * db.js -> db/index.js
  * Deleted unused static resources
  * Added lib folder