Added really shoddy, probably broken git plugin

plugins/update.py

@@ -0,0 +1,40 @@
+from git import Repo
+
+
+from util import hook, web
+
+@hook.command
+def update(inp, bot=None):
+    repo = Repo()
+    git = repo.git
+    pull = git.pull()
+    if "\n" in pull:
+        return web.haste(pull)
+    else:
+        return pull
+
+
+@hook.command
+def version(inp, bot=None):
+    repo = Repo()
+
+    # get origin and fetch it
+    origin = repo.remotes.origin
+    info = origin.fetch()
+
+    # get objects
+    head = repo.head
+    origin_head = info[0]
+    current_commit = head.commit
+    remote_commit = origin_head.commit
+
+    if current_commit == remote_commit:
+        in_sync = True
+    else:
+        in_sync = False
+
+    # output
+    return "Local {} is at commit {}, remote {} is at commit {}." \
+           " You {} running the latest version.".format(head, current_commit.name_rev[:7],
+                                                        origin_head, remote_commit.name_rev[:7],
+                                                        "are" if in_sync else "are not")