Update Readme.

README.rst

@@ -1,17 +1,98 @@
 A REPL for Postgres 
 -------------------
 
-** _WARNING_: This is a WIP. Please DO NOT use. **
-
 This is a postgres client that does auto-completion and syntax highlighting.
 
+.. image:: screenshots/image01.png
 
 Installation
 ============
 
+If you don't know how to install python pacakges, please check the `detailed instructions`__.
+
+__ Detailed Installation Instructions
+
+If you already know how to install python pacakges, then you can simply do:
+
 ::
 
-    pip install pgcli
+    $ pip install pgcli
+
+
+Detailed Installation Instructions:
+===================================
+
+OS X:
+-----
+
+For installing Python pacakges it is recommended to use the package manager
+called `pip`. Check if `pip` is installed on the system.
+
+:: 
+
+    $ which pip
+
+If it is installed then you can do:
+
+:: 
+
+    $ pip install pgcli
+
+If that fails due to permission issues, you might need to run the command with
+sudo permissions. 
+
+::
+
+    $ sudo pip install pgcli
+
+If pip is not installed check if easy_install is available on the system.
+
+:: 
+
+    $ which easy_install
+
+    $ sudo easy_install pgcli
+
+Linux:
+------
 
 
 
+
+Usage
+=====
+
+:: 
+
+    $ pgcli [database_name]
+
+    or
+
+    $ pgcli postgresql://[user[:password]@][netloc][:port][/dbname] 
+
+Examples: 
+
+:: 
+
+    $ pgcli local_database
+
+    $ pgcli postgres://amjith:pa$$w0rd@example.com:5432/app_db
+
+
+Features
+========
+
+The `pgcli` is written using prompt_toolkit_.
+
+* Auto-completion as you type for SQL keywords as well as tables and
+  columns in the database.
+* Syntax highlighting using Pygments.
+* Smart-completion (enabled by default) will suggest context-sensitive completion.
+
+      - `SELECT * FROM <tab>` will only show table names. 
+      - `SELECT * FROM users WHERE <tab>` will only show column names. 
+
+* Config file is automatically created at ~/.pglirc at first launch.
+* Primitive support for `psql` back-slash commands. 
+
+.. _prompt_toolkit: https://github.com/jonathanslenders/python-prompt-toolkit