Update capybara dependency
Add go_back and go_forward implementation in poltergeist capybara driver
Added in capybara 2.2.0
Allow change the contents of a contenteditable element
Add CHANGELOG entry
Merge pull request #416 from pedrocarrico/master

Update capybara dependency
Entering negatives into an <input type="number">

When entering a negative number into a value field. The absolute value
would instead be set. This is because values are entered char-by-char
and '-' by itself wasn't considered a valid value.

This modifies PoltergeistAgent.Node.set to set the entire value at once
for an input type=number. Number fields aren't necessarily set via
keypresses anyways (they have those little buttons).

Includes a failing test case.

This change may be unnecessary if native keyboard events are used
again (landed in c7ba561, reverted in 70304cc).
Add CHANGELOG entry

Change-Id: Ibf5c46b50767dee5180e34dc04e05acd0f40b82e