docTransform option + return cursor from getData

[Sewdn]

Add optional configuration setting (docTransform) to transform search results documents. The current transform option adds the possibility to transform the fields of the found documents, but there is now way to add document helpers (model helpers) to the documents.

Also add the ability to return a cursor (getData) instead of a hydrated array.

[Sewdn]

Sorry, I also changed the package info in this pullrequest...

[arunoda]

Try to add the changes to the README as well.

[Sewdn]

Ok, all done!

[arunoda]

@Sewdn if(options.docTransform) also needs a curly brace :)

[Sewdn]

Sorry. Old habits die hard ;)

[arunoda]

Great. Thanks.