Added elpa package info.

Author: lukehoersten

haskell-snippets.el

@@ -1,7 +1,10 @@
 ;;; haskell-snippets.el --- Yasnippets for Haskell
 
-;; Copyright (C) 2013 Luke Hoersten
-;; keywords: snippets
+;; Copyright (C) 2013-2015 Luke Hoersten
+
+;; Author: Luke Hoersten <luke@hoersten.org>
+;; URL: https://github.com/haskell/haskell-snippets
+;; Keywords: snippets, haskell
 ;; Version: 0.1.0
 ;; Package-Requires: ((yasnippet "0.8.0"))
 
@@ -24,6 +27,45 @@
 ;; OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 ;; WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 
+;;; Commentary:
+;;
+;;   Haskell-Snippets is a collection of YASnippet Haskell snippets for Emacs.
+;;
+;;   Available Expansion Keys:
+;;
+;;       new  - newtype
+;;       mod  - module [simple, exports]
+;;       main - main module and function
+;;       let  - let bindings
+;;       lang - language extension pragmas
+;;       opt  - GHC options pragmas
+;;       \    - lambda function
+;;       inst - instance declairation
+;;       imp  - import modules [simple, qualified]
+;;       if   - if conditional [inline, block]
+;;       <-   - monadic get
+;;       fn   - top level function [simple, guarded, clauses]
+;;       data - data type definition [inline, record]
+;;       =>   - type constraint
+;;       {-   - block comment
+;;       case - case statement
+;;
+;;   Design Ideals:
+;;
+;;       Keep snippet keys (the prefix used to auto-complete) to four
+;;       characters or less while still being as easy to guess as
+;;       possible.
+;;
+;;       Have as few keys as possible. The more keys there are to
+;;       remember, the harder snippets are to use and learn.
+;;
+;;       Leverage ido-mode when reasonable. For instance, to keep the
+;;       number of snippet keys to a minimum as well as auto complete
+;;       things like Haskell Langauge Extension Pragmas. When multiple
+;;       snippets share a key (ex: 'fn'), the ido-mode prompts are unique to
+;;       one character (ex: 'guarded function' and 'simple function' are 'g' and
+;;       's' respectively).
+
 ;;; Code:
 
 (setq haskell-snippets-dir