set jshint params per group discussion

```
    "maxparams"     : 3,         // {int} Max number of formal params allowed per function
    "maxdepth"      : 2,         // {int} Max depth of nested blocks (within functions)
    "maxstatements" : 12,        // {int} Max number statements per function
    "maxcomplexity" : 6,         // {int} Max cyclomatic complexity per function
    "maxlen"        : 80,        // {int} Max number of characters per line
```