func (c *appContext) deletetaskHandler(w http.ResponseWriter, r *http.Request) {
params := context.Get(r, "params").(httprouter.Params)
repo := tasksModel.TaskRepo{c.db.C("tasks")}
err := repo.Delete(params.ByName("id"))
if err != nil {
panic(err)
}
w.WriteHeader(204)
w.Write([]byte("\n"))
}
