Notify ol.Object source when transform is called
ol.Object doc improvement
Add a test for ol.Object
Unused var
Allow cwd to be configured for build

By default, all paths in the build config (e.g. externs) are assumed to be relative to the ol3 repo root.  To make it so relative paths are resolved from a different directory, use the cwd option.

In addition, this change makes it so the `build.js` task can be run from another directory.
Merge pull request #2275 from tschaub/relative

Allow build task to be run from anywhere and provide option for resolving relative paths.
Merge pull request #2264 from elemoine/object

ol.ObjectAccessor#transform shouldn't dispatch an event to the target object
Document that panning triggers pointermove on touch
Merge pull request #2277 from probins/pm

Document that panning triggers pointermove on touch