Enable CSS grid prefixing

Add css grid autoprefixing (#503)

* update fixture to use grid

* update expected css built from fixture

* Add grid autoprefixing

* ignore optional deps on travis

Add debug tag for obt test

Running obt t --debug will now leave the test runner open, this will help when debugging manually is required.

Add an origami.json

v7.2.3

Add an origami.json (#500)

Use babel-preset-env instead of specific babel presets

Replace babel presets with preset-env (#499)

This is after running tests to determine that the output is identical for
es2015,2016,2016 and es3 code (output string is deepEquals).

es3 presets are _not_ included in preset-env, but without configuration it is identical
to the es-preset-20xx modules.

It would be nice to have some form of snapshot testing to verify this.

Run Whitesource on Circle CI

v7.2.1

7.2.1

v7.2.0: update deps to latest version (#495)

* update deps to latest version

* use new origami bower registry

* Fix linting issues

v7.1.0

Don't remove build artifacts before publishing

v7.0.4

Document the --demo-filter flag (#493)

v7.0.3

Update bower registry repo URL to new canonical version (#492)

Use a text-based renderer when running inside CI environments

v7.0.2

Use a verbose renderer for CLI output when running in a CI environmen…