Added Setting for inner comment block prefixing

As a developer using coffeescript and YUIdoc, the inner block prefix cannot be "*", and must instead be "#". For example,
```
  ###*
   *  Not Gonna' Work
  ###
```
  -------------------- vs. --------------------------
```
  ###*
   #  Gonna' Work
  ###
```
So I added a setting for it.... woohoo docblokr ruleeeessss