Merge pull request #1 from madebydna/master

attr_accessible fixes in FlowTaskResource model
Merge pull request #2 from madebydna/master

Added :resource to attr_accessible in FlowTaskResource
Merge branch 'master' of git://github.com/madebydna/riparian
adding deleted_at field to FlowTask and method stub for safely aborting tasks
using  as a method name was probably not a good idea