[FEATURE query-params-new] alias computed.reads as computed.oneWay

oneWay is ambiguous. Which way?

Ember.computed.alias is a way more semantically meaningful alias of 
Ember.computed.oneWay.

Example: http://jsbin.com/ucanam/3000

Putting this in query params because I'd like to use this in some of the
examples for query params; seems like it'll be common lightweight pattern for
buffering small changes, and oneWay is just enough of a mental hurdle to
necessitate this.