Allow user to toggle between "All or Nothing" and "Keep it all" campaign types

[mattlebel]

Allow user to select which type of campaign he/she would like to create.

All or Nothing - Funds are not collected unless user reaches a set goal amount
Keep it all - Funds are collected and disbursed to campaign admin whether or not the goal amount is raised.

[ramyothman]

Is there some property in the Crowdtilt API that we could pass the selection to , cause was checking the
https://github.com/Crowdtilt/crowdtilt-api-spec#campaigns and doesn't seem it has the option