2.0.0

• moved to postmark email-template
• removed jsoup from dependency
• redesigned the hole api
  • extended table support with interfaces and options for custom layouts
  • added key-value pairs
  • many more
• pom artifact group changed to io.rocketbase.mail
• cleaned up a lot of code
• separated module in two pices
  • common builder
  • markdown (with markdown support)