Fixed readme links and description

Author: obscuren

README.md

@@ -12,15 +12,17 @@ master    | [![Build+Status](https://build.ethdev.com/buildstatusimage?builder=L
 [![Stories in Progress](https://badge.waffle.io/ethereum/go-ethereum.svg?label=in%20progress&title=In Progress)](http://waffle.io/ethereum/go-ethereum)
 [![Gitter](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/ethereum/go-ethereum?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge)
 
-Automated (dev) builds
+Automated development builds
 ======================
 
+The following builds are build automatically by our build servers after each push to the [develop](https://github.com/ethereum/go-ethereum/tree/develop) branch.
+
 * [Docker](https://registry.hub.docker.com/u/ethereum/client-go/)
 * [OS X](http://build.ethdev.com/builds/OSX%20Go%20develop%20branch/Mist-OSX-latest.dmg)
 * Ubuntu
   [trusty](https://build.ethdev.com/builds/Linux%20Go%20develop%20deb%20i386-trusty/latest/) |
   [utopic](https://build.ethdev.com/builds/Linux%20Go%20develop%20deb%20i386-utopic/latest/)
-* [Windows 64-bit](https://build.ethdev.com/builds/Windows%20Go%20develop%20branch/Geth-Win64-latest.7z)
+* [Windows 64-bit](https://build.ethdev.com/builds/Windows%20Go%20develop%20branch/Geth-Win64-latest.zip)
 
 Building the source
 ===================