fix feature definition in case user has RSpec set not to expose dsl globally - test in rspec 3 beta tests
force chrome install
Merge pull request #1287 from twalpole/force_chrome

force chrome install in travis
Merge branch 'master' into issue_1285

* master:
  force chrome install
Merge pull request #1288 from twalpole/issue_1285

Call describe on RSpec in feature definition - fix issue #1285
Don't force expose_dsl_globally=false

Don't force expose_dsl_globally=false on driver maintainers
Add ability to save and open screenshot

This adds a new method `save_and_open_screenshot` that saves the screenshot then
opens it for inspection.

Refactor duplicate logic for `save_and_open_page` and `save_and_open_screenshot`