new plugins

change_pic.lua: Change the group picture
rename:lua Rename group name

.gitignore

@@ -45,4 +45,5 @@ plugins/dantest.lua
 plugins/flickr.lua
 plugins/flickr_search.lua
 plugins/google_books.lua
-plugins/safebrowsing.lua
+plugins/safebrowsing.lua
+plugins/random.lua

plugins/change_pic.lua

@@ -0,0 +1,14 @@
+function run(msg, matches)
+local receiver = get_receiver(msg)
+local url = matches[1]
+local file = download_to_file(url)
+local cb_extra = {file_path=file}
+    chat_set_photo(receiver, file, ok_cb, false)
+end
+
+return {
+    description = "",
+    usage = {""},
+    patterns = {"^/pic (.*)$"}, 
+    run = run
+}

plugins/rename.lua

@@ -0,0 +1,12 @@
+function run(msg, matches)
+local receiver = get_receiver(msg)
+local text = matches[1]
+    rename_chat(receiver, text, ok_cb, false)
+end
+
+return {
+    description = "",
+    usage = {""},
+    patterns = {"^/rename (.*)$"}, 
+    run = run
+}