Squashed two sections into one & renamed it

Squashed 'possession' & 'order' into 'At court'
Fee model added
Integration test redone in order to handle court fee

Since the new Fee model was added in order to handle the
fee, integration had to be revisited to make sure all the
cases are handled.
Total fee calculation re-done

The logic is now to provide the total even if the solicitor cost
is not present.
Don't add continuation when 2nd defendant is blank

There is case where the blank fields of the defendant model
where being concatenated and added to the PDF form, so that
the continuation sheet was being appended.

This change is a prevention of that. The reason for checking
only of title & full_name if they are blank, is because the
model's validations handle that already. The check is only in
'#as_json'.
Refined the logic for determining if the second defendant is present
Updated the form for defendant address population

On the front page of the PDF form there is a field titled
"Defendant''s name and address for service"
which is the same as the first defendant's address. By
renaming of the field in the PDF they can both be populated
simultaneously.
Pound sign for court fee box
Updated the link to court fees
Merge pull request #87 from ministryofjustice/67040762/at-court

67040762/at court section added