ol.Feature.prototype.get need not be exported

get is not overridden in ol.Feature.prototype, so there's no need for a specific export.
Move and rename exports file for ol.expr
Move exports file for proj
Select example and skeleton with event listeners
Adding selection layer and implementing basic click selection
Making the control's button work
Require layers
Adding change event
Simplifying clear/append detection
Adding tests
Making Travis happy
Adding exports
Making JSDoc happy
Work with clones rather than the original features
Adding missing @requires
One selection layer per source layer

This way all styles can be defined on the source layer, by
defining a rule with a select renderIntent. It also will make
addition and removal of layers easier while the select control
is active.
Example update after recent API changes
New ThisIdentifier expression

This allows member expressions to use the 'this' keyword.
Implementing renderIntent handling
Removing option for temporary layer

Instead, adding setter and getter for a private temp_ property,
as suggested by @elemoine.