JSON validation checks improved.
Merge branch 'develop'

* develop:
  JSON validation checks improved.
Merge branch 'master' of https://github.com/stuarteske/sika-liquidplastics-app

# By James Cogley
# Via James Cogley
* 'master' of https://github.com/stuarteske/sika-liquidplastics-app:
  ipad.json, output directory altered.