Ruby template refactoring

[noraj]

• #29 remove require "uri" because it's already included by require "net/http"
  • require 'net/http' This will also require 'uri' so you don't need to require it separately. Ref
• #29 remove require 'openssl' because it's already included by require "net/http"
  • In previous versions of Ruby you would need to require 'net/https' to use HTTPS. This is no longer true. Ref same for openssl
• #31 multipart refactor
• #29 rubocop-like better styling
  • prefer single quote over double quote when no string interpolation needed
  • space between operators