added readme of how quickcd should work

readme.txt

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+Quick cd keeps tracks of directoreis you work the most often and allows you
+to cd to them in the blink of an eye.
+
+It was written by Peteris Krumins (@pkrumins or peter@catonmat.net).
+His blog is at http://www.catonmat.net  --  good coders code, great reuse.
+
+------------------------------------------------------------------------------
+
+First `git clone http://github.com/pkrumins/quick-cd`, then make sure to alias
+your cd to qcd,
+
+    alias cd=qcd
+
+This will record all the directories you ever work in.
+
+After that, bind a keystroke to bring up the list quickly,
+
+    bind "\C-[d": "qcd\n"
+
+Now each time you git Alt-d (or Esc-d), quick cd will pop up a list of most
+frequently used directories.
+
+Now if you can use arrow keys to navigate the list, or type a pattern to find
+a dir. Hit enter and you'll be transferred to that directory.
+
+That should make you super fast in the shell!
+
+------------------------------------------------------------------------------
+
+Have fun being quicker in the shell!
+
+
+Sincerely,
+Peteris Krumins
+http://www.catonmat.net
+