Fix #6372

closes #6430

closes #6368

closes #6354

closes #6279

and remove unused HttpPost mock

correcting images display on stream sidebar

Corrections on profile page

database_rewinder seems to cause deadlocks in postgres and other
subtle bugs for us.

- Use custom matcher that polls #value of the element
- Wait for the text field to become visible before entering text

on it

Spring is the recommended application preloader for rails

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

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