add tests for parameters
dropkey
Add tests
Update to chainable
Merge branch 'orderby-unit-test' of github.com:mapbox/vtfx into unit-test-dropkey
Merge branch 'master' of github.com:mapbox/vtfx-drop into test-params
test parameters in unit tests
update parameter doc
more sensible defaults
add tests for parameters
remove unit tests for parameters
note that if field === field, studio ui will autopopulate
Merge pull request #36 from mapbox/test-params

Test parameters
Merge branch 'master' of github.com:mapbox/vtfx into unit-test-dropkey
Stricter options testing
Remove redundant GC call
Merge pull request #33 from mapbox/unit-test-dropkey

Unit test dropkey
Merge with master