Added indent to arrays

I had this :

{
 "Fer" :  {
  "color" : [
0.296361,
0.307408,
0.331609,
1.0
  ]
 }
}

And wanted this :

{
 "Fer" :  {
  "color" : [
   0.296361,
   0.307408,
   0.331609,
   1.0
  ]
 }
}

refactored indentation

corrected issues
Merge pull request #40 from mathieu/array_indent

Added indent to arrays