Moved the JSON support method into support dir

The method is used twice in different specs.
Rather than duplicating it, moved it under 'support'.
The continuation is being appended

Also moved & really added the files under support
Renamed the method in AttorneyContinuations

As this method deals with filling in Continuation A1
Slimmed down the specs for continuationA1
Enabled the hash for continuation C1 sheet
Append the continuation sheet C to the final LPA
Refactored the way continuations are added
Merge pull request #78 from ministryofjustice/attorney_continuation

Attorney continuation