Add ability to push and load a template from Bintray

[philippeback]

So that users can have their own templates (or instead of users, groups of users interested in the same thing) space on the web.

Removes the need to ask for a template to be included in the official release.

https://bintray.com/docs/api/

[seandenigris]

@philippeback Could you say more about your proposal? I'm looking for user-defined templates and trying to figure out if your issue is related (maybe a subset?)...