Fix #104 Toggling renderInPlace

[dnachev]

After the change in #101, the wormhole cannot toggle from render in place to render elsewhere, because destinationElement CP is never read and therefore the observer will never fire when renderInPlace has changed. (Issue #104).

I'm little unclear why we need the change from #101, but presumably we want to specify an explicit element to be used as a wormhole rather than selector. In this case, we will need to a new computed property (private) to capture all possible parameters, which ember-wormhole component can receive and observe them for changes.

If there are other reasons, we can discuss a different fix for the issue.

[nlfurniss]

@dnachev you can fix the travis issues with this: ember-cli/ember-fetch@0a817ff

[dnachev]

Thanks @nlfurniss . Trying it out.

[fivetanley]

@lukemelia apologies for the direct ping; do you think you or another yapper have some cycles to review+release this?

[lukemelia]

@fivetanley For you, anything :D -- released as 0.5.5

[fivetanley]

@lukemelia <3 quickest merge in the west. thanks!