added get methos to slash. You can get a reference with its content
Docset module has been converted to an object. Each request to database
needs its own query object.

I don't feel good with this solution but for now is quite good and it's works.
Added get method to API.

You can get reference content like this:

{
  "docset": "slash",
    "reference": "search",
	   "type": "function",
		  "content": "This is an
  example\n-----\n\nexample.foo(bar)\n\n**some**
  descriptive *text*\n\n\t\t\t\tfunction
  example.foo(bar){\n\t\t\t\t\treturn bar;\n\t\t\t\t}"
  }

with this request:
http://localhost:3000/get/slash/function/search