Make sure record data is clonable before sending it

Fixes #101
upgrade to ember master 1.5.0-beta.1+canary.a4595d13
Merge pull request #105 from stefanpenner/upgrade-ember

upgrade to ember master 1.5.0-beta.1+canary.a4595d13
Add Promise Tree
Improve Promise design
Assemble promises and send them using PromiseDebug
Promise filtering initial work
Add Send to console and object inspection to promises
Add promise filters and search
Add promise clear button
Account for promise label being null
Fix promise createdAt
Reintegrate with new RSVP version
Fix promise filter
Add timing info to promises
Hide send to console button if promise hasn't settled
Add limitation to value column width in promise tree
Provide not supported message for older Ember versions
Fix route tests to account for loading and error substates
If promise has no label and chained default to 'Then'