Revise README to clarify project purpose and data sources

README.md

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+= They Work For You (aussie rules) =
+
+This is a fork of a 2001-ish era PHP app from MySociety in the UK, repurposed for Australia. This is the software running on https://openausralia.org.au
+
+== What is OpenAustralia.org.au ? ==
+
+OpenAustralia.org.au is a website run by the non-partisan charity, OpenAustralia Foundation, which makes Australian government and parliamentary information easily accessible to the public through tools such as searching Hansard (parliamentary debates) and tracking politicians' voting records. The site aims to increase transparency and civic engagement in Australian democracy. It provides platforms to easily follow what MPs and Senators say and do, and tracks their registers of interests.
+
+ == What is this data? ==
+
+Everything elected politicians say in Australia's Senate and Parliament is recorded in Australia's Official Hansard. This documentation is obtained using scapers (see https://github.com/openaustralia/openaustralia-parser/ )
+and displayed on openaustralia.org.au. 
+
+=== data feeds ==
+
+Data is also provided for public use at http://data.openaustralia.org.au/
+
+TheyVoteForYou.org.au is one of the users of this data.