Readme has been updated

readme.md

@@ -21,3 +21,34 @@ Who might be interested in it?
 
 
 ![alt tag](https://cloud.githubusercontent.com/assets/10683398/6396608/94f89e3a-be09-11e4-982c-5bf3a57bc6f4.png)
+
+Pre-requirements:
+-----
+
+* qt (4.0 5.0)
+
+* gstreamer-1.0
+
+* pkgconfig
+
+
+
+Building:
+-----
+
+cd pipeviz
+
+qmake pipeviz.pro
+
+make gitinfo
+
+make
+
+
+
+Prebuilt binaries
+-----
+
+Prebuilt binaries for windows are available.
+
+[Latest Release](https://github.com/virinext/pipeviz/releases/latest)