preparing json/ to be replaced with subtree

Signed-off-by: Denis Zalevskiy <denis.zalevskiy@jollamobile.com>
Squashed 'json/' content from commit ff55d8d

git-subtree-dir: json
git-subtree-split: ff55d8d4513b149e2511aee01c3a61d372837d1f
Merge commit '0ab52aae2bc7aa7b5c8468ebab716c96323d4743' as 'json'