Added TitleManager api which can be gotten through "TitleManager" variable
### TitleManager Docs
* [Title messages]( https://github.com/Puharesource/TitleManager/wiki/Developers-Title-Messages)
* [Actionbar messages]( https://github.com/Puharesource/TitleManager/wiki/Developers-Actionbar-Messages)
* [Player list header and footer]( https://github.com/Puharesource/TitleManager/wiki/Developers-Player-List-Header-And-Footer)
* [Scoreboard]( https://github.com/Puharesource/TitleManager/wiki/Developers-Scoreboard)

HttpManager can now handle headers.
```js
http.getWithHeaders("url", "headers as json");
http.postWithHeaders("url", "headers as json", "body as json");
```