v0.2

Summary of changes:

• Support for go 1.8
• Improved injection for middlewares
• Tons of new practical examples for middleware injection:
  • Gorilla
  • Mux
  • Negroni
  • Gin
  • JSON Web Token (JWT)
• DNS SRV Service Discovery
• Accept collections in the backend responses (as opposed to objects)
• Router extended to allow injection of contexts
• Integration tests on Travis
• Custom HTTPClientFactory implementations
• RSS decoder added