Be smart about versions of Ember where version is provided by bower and where versions are provided by npm

[kategengler]

Related to emberjs/ember.js#13022

Older versions of ember need to be provided by bower. Newer versions will be provided by npm.

versionCompatibility way of running should be made to just do the right thing.

Manual config should have ember under the correct key. Update blueprint in ember-cli (or switch to version compatibility by default).

[kategengler]

With #108, configuration for using ember-source should be possible. Used here: https://github.com/emberobserver/client/blob/master/config/ember-try.js#L30, but tests are failing so I'm not sure I've switched over entirely right.

Still need to determine what canary and beta look like from npm.

[broerse]

We now have beta it seems. npm view ember-source dist-tags

[broerse]

There is an issue related to this. #91

[kategengler]

We did this!

[broerse]

@kategengler We love it!