[Server] HowTo create server app
[Server] code highlight in howto
[Server] some typos in howto
[Server] improved some links in howto
[Server] links fix in howto
[Server] links fix in howto
[Server] links fix in howto
[Client] HowTo create client app
[Client] update TODO in howto
Merge branch 'master' into rest-framework

* master:
  [Client] update TODO in howto
  [Client] HowTo create client app
  [Server] links fix in howto
  [Server] links fix in howto
  [Server] links fix in howto
  [Server] improved some links in howto
  [Server] some typos in howto
  [Server] code highlight in howto
  [Server] HowTo create server app