Add README.md for github

README.md

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+pecl/pq
+=======
+
+[![Build Status](https://travis-ci.org/php/pecl-database-pq.svg?branch=master)](https://travis-ci.org/php/pecl-database-pq)
+
+About
+-----
+
+This is a modern binding to the mature [libpq](http://www.postgresql.org/docs/current/static/libpq.html), the official PostgreSQL C-client library.
+
+Highlights:
+
+- Nearly 100% support for asynchronous usage.
+- Extended type support by pg_type.
+- Fetching simple multi-dimensional array maps.
+- Working [Gateway implementation](https://github.com/m6w6/pq-gateway).
+
+Installation
+------------
+
+This extension is hosted at [PECL](http://pecl.php.net/) and can be installed with [PEAR](http://pear.php.net/)'s `pecl` command:
+
+    # pecl install pq
+
+Dependencies
+------------
+
+This extension unconditionally depends on the pre-loaded presence of the following PHP extensions:
+
+- [raphf](http://pecl.php.net/package/raphf)
+- [spl](http://php.net/spl)
+
+Documentation
+-------------
+
+Documentation is available [here](http://devel-m6w6.rhcloud.com/mdref/pq).