Accept POST messages without title

[JohnnyLeone]

I'd like to use the requests for a application without always specifying a title for it. The title should not a mandatory field and if no title got specified we should always pick the application name for it. This also reduces the minimum size of a API request.

[madding]

@jmattheis I make pull request in my fork, because I don't have permission. Please, try to check it #72

[jmattheis]

Done in #72