Added method self.all for class Worklog

[abataloff]

No description provided.

[bobbrodie]

@abataloff two things on this:

1. Tests are failing
2. Why remove belongs_to :issue?

[abataloff]

Tests are failing
< Sorry, I do not know much Ruby, I can not understand why the fall tests. I suspect because of the remove belongs_to :issue

Why remove belongs_to :issue?
<Because initializing the object there was an error "Required option: issue messing"

[SimonMiaou]

Some tests would be nice

[SimonMiaou]

What about using new?

        json['worklogs'].map do |attrs|
          self.new(client, {:attrs => attrs})
        end

This would allow you to put back issue and probably make the tests green again