added doc.go file for packages package

lib/packages/doc.go

@@ -0,0 +1,27 @@
+// Copyright 2016 The lime Authors.
+// Use of this source code is governed by a 2-clause
+// BSD-style license that can be found in the LICENSE file.
+
+// The packages package handles lime package management.
+//
+// The key idea of lime packages is modularity/optionality. The core backend
+// shouldn't know about tmbundle nor sublime-package, but rather it should
+// make it possible to use these and other variants. @quarnster
+// Ideally packages implemented in such a way that we can just do:
+// import (
+// _ "github.com/limetext/lime/backend/textmate"
+// _ "github.com/limetext/lime/backend/sublime"
+// _ "github.com/limetext/lime/backend/emacs"
+// )
+//
+// Package type
+//
+// Each plugin or package that wants to communicate with backend should
+// implement this interface.
+//
+// Record type
+//
+// For enabling lime to detect and load a package it should register itself as
+// a Record
+//
+package packages