Incidents fix (#11)

* Added APIListObject to Option types to allow setting offset and

page through more than the inital 25 returned entries.
Also renamed a file with typo and gofmt changed ordering of some
of the imports.

* Added missing ? in incidents url

incident.go

@@ -64,7 +64,7 @@ func (c *Client) ListIncidents(o ListIncidentsOptions) (*ListIncidentsResponse,
 	if err != nil {
 		return nil, err
 	}
-	resp, err := c.Get("/incidents" + v.Encode())
+	resp, err := c.Get("/incidents?" + v.Encode())
 	if err != nil {
 		return nil, err
 	}