rainbowstream: add page

Ref #1162

pages/common/rainbowstream.md

@@ -0,0 +1,28 @@
+# rainbowstream
+
+> Terminal-based Twitter Client. Realtime tweetstream, compose, search , favorite … and much more.
+> Online help with `h`, up and down arrow for history, tab auto-complete, 2-tab suggestion.
+
+- show your timeline
+
+`home [{{num_of_last_tweets}}]`
+
+- show profile of given user
+
+`whois @{{user}}`
+
+- tweet the message as-is
+
+`t {{message}}`
+
+- retweet the tweet with given id (id beside the time)
+
+`rt {{tweet_id}}`
+
+- favorite the tweet with given id
+
+`fav {{tweet_id}}`
+
+- perform a search for word (with or without hashtag)
+
+`s {{word}}`