2.0.0

This version has breaking changes:

• New Vert.x client is now available
• Major refactoring in multiple places
  • Use a common library to remove code duplication, moving many classes in com.chavaillaz.client.common
  • Move main package com.chavaillaz.jira to com.chavaillaz.client.jira to align with common library
  • Refactor authentication and provide token and password default implementations
  • Move default client initialization for each HTTP client inside JiraClient
  • Rename client classes to API
• Update dependencies