new plugin:better alias

plugins/README.markdown

@@ -2,6 +2,7 @@
 * __android-sdk__ – [Android SDK](http://developer.android.com/sdk/index.html) integration.
 * __archlinux__ – Provides a number of plugins to make using Arch Linux easier.
 * __autojump__ – Makes navigating filesystem much faster. See [autojump article](https://github.com/joelthelion/autojump/wiki) and [video](https://www.youtube.com/watch?v=tnNyoMGnbKg). Bindings only, autojump needs to be installed separately.
+* __better-alias__ - Provide alias with auto completion.
 * __brew__ – [Homebrew](http://brew.sh/) integration.
 * __bundler__ – Use Ruby's [Bundler](http://bundler.io/) automatically for some commands.
 * __ccache__ – Enable [ccache](http://ccache.samba.org/) to speed up compilation.

plugins/better-alias/README.md

@@ -0,0 +1,16 @@
+# A better alias provide completion
+
+Use `balias` instead of `alias`,you can get same completion meanwhile you set  alias.
+
+# Example
+
+```
+balias apti 'sudo apt-get install'
+balias gc   'git checkout'
+```
+
+Then,you will get
+
+![apti](http://www.geekpics.net/images/2014/08/23/TJn6kfBY.png)
+
+![gc](http://www.geekpics.net/images/2014/08/23/655x76xcPJolvxqra.png.pagespeed.ic.4S9hgPfZ53.png)

plugins/better-alias/balias.fish

@@ -0,0 +1,11 @@
+function balias --argument alias command
+  eval 'alias $alias $command'
+  if expr match $command '^sudo '>/dev/null
+    set command (expr substr + $command 6 (expr length $command))
+  end
+  complete -c $alias -xa "(
+    set -l cmd (commandline -pc | sed -e 's/^ *\S\+ *//' );
+    complete -C\"$command \$cmd\";
+  )"
+end
+