Add support for returning via callback passed to operative method. Deprecated direct-return and this.async()
Implement Iframe context and refactor context-specific code into Operative.Worker and Operative.IFrame. Also add iframe-specific tests.
arbitrary dev browser testing
fix readme to reflect latest API and commit 0.2.0 build
Implement ability to specify dependencies (support both contexts: Iframe/Worker)
fix dev deps test
0.2.0 build
update readme to reflect changes in 0.2.0