Adapt cukes to work with new capitalisation rules

- create handlebars template for hovercards
- fix notifications-dropdown (workaround) to remain open when aspect
  selector is clicked

This conversion is done by Transpec 2.3.6 with the following command:
    transpec features

* 19 conversions
    from: obj.should
      to: expect(obj).to

* 1 conversion
    from: == expected
      to: eq(expected)

For more details: https://github.com/yujinakayama/transpec#supported-conversions

* Bump sass-rails (without effect)
* Bump mobile-fu (without effect)
* Cosmetically fix two cukes
* Refactor Taggable#tag_strings
* Rename default.css to default.css.scss (without effect)
* Fix receiving a conversation
* Pass aspect_ids instead of a relation to User#aspects_from_ids

Added delete label to photos in gallery

added an event to delete photos of current user

Added css for hiding/revealing the delete label

Included the photo stylesheet

Added cucumber test for deleting your own photos

Removed wip

last input field is only deleted if there are more than three input fields and the last one is empty

poll is validated only if the last input is empty, and the first three have been filled

Removed duplicate remove last answer.

Dont need to check that the last value is populated as we are ignoring last value

Fixing poll step

Placeholder text edited

Fixed translations for poll answer placeholder text

Removed numbers on publisher option

Removed numbers in placeholder for poll answers