added git-age and git maildiff command links

Author: sanfx

README.md

@@ -114,6 +114,9 @@ If you aren't using any zsh frameworks, or if you're a bash user, do the followi
 | `git-incoming-commits` | Ryan Tomayko's [dotfiles](https://github.com/rtomayko/dotfiles) | Adds a remote for the current repository for the given github username. |
 | `git-incoming` | Michael Markert's [dotfiles](https://github.com/cofi/dotfiles) | Show commits in the tracking branch that are not in the local branch. |
 | `git-ls-object-refs` | Ryan Tomayko's [dotfiles](https://github.com/rtomayko/dotfiles) | Find references to an object with SHA1 in refs, commits, and trees. All of them. |
+| `git-maildiff` | Sanjeev Kumar's
+[blogpost](http://www.devilsan.com/blog/my-first-git-command-git-ipush-using-python) | A simple git
+command to email diff in color to reviewer/ co-worker. |
 | `git-maxpack` | John Wiegley's [git-scripts](https://github.com/jwiegley/git-scripts) | Compress a repo's pack files as much as possible. |
 | `git-move-commits` | Corey Oordt's [git-scripts](https://github.com/coordt/git-scripts/blob/master/git-move-commits) | `git move-commits num-commits correct-branch` moves the last n commits to correct-branch (creating it if necessary). |
 | `git-neck` | Christian Neukirchen's [blog](http://chneukirchen.org/blog/archive/2013/01/a-grab-bag-of-git-tricks.html) | Show commits from the HEAD until the first branching point. Companion script for `git-trail`. |

git-extra-commands.plugin.zsh

@@ -22,6 +22,7 @@ alias gitroot='cd $(git rev-parse --show-toplevel) && echo "$_"'
 #   incoming-commits  (appears to be a dupe of grab)
 #   mark-all-resolved (git: 'conflicts' is not a git command.)
 zstyle ':completion:*:*:git:*' user-commands \
+  age:'A git-blame viewer, written using PyGTK written by Kristoffer Gronlund ' \
   big-file:'List disk size of files in ref' \
   change-author:'Rewrite commits, updating author/email' \
   changes:'List authors/emails with commit count' \
@@ -38,6 +39,7 @@ zstyle ':completion:*:*:git:*' user-commands \
   improved-merge:'Sophisticated git merge with integrated CI check and automatic cleanup upon completion' \
   incoming:'Fetch remote tracking branch, and list incoming commits' \
   ls-object-refs:'Find references to <object> SHA1 in refs, commits, and trees. All of them' \
+  maildiff: 'Simple git command to email diff in color to reviewer/co-worker & optionally attach patch file.' \
   maxpack:'Repack with maximum compression' \
   nuke:'Nukes a branch locally and on the origin remote' \
   object-deflate:'Deflate an loose object file and write to standard output' \