Close #2 with suggested instructions. Thanks @michalskop!

README.md

@@ -9,13 +9,19 @@ pgtap extension to run.
 
 ## Install
 
+You will require sudo privledges and the postgres development
+libraries for your operating system in most cases.  For ubuntu on
+postgres 9.5 for example, you can install them with:
+
+    sudo apt-get install postgresql-server-dev-9.5
+
 Clone the repository and then run:
 
     'make install'
 
-You will require sudo privledges in most cases.  This creates a new
-extension that can be installed with 'CREATE EXTENSION pgjwt;' To run
-the tests install pgtap and run 'pg_prove test.sql'.
+This creates a new extension that can be installed with 'CREATE
+EXTENSION pgjwt;' To run the tests install pgtap and run 'pg_prove
+test.sql'.
 
 
 ## Usage