Only include zip snapshot link for windows

tar.gz is sufficient for all operating systems except for windows, which by
default only includes zip. There's no reason to provide both links, and we
intend to stop publishing the alternative links altogether at some point.

README.md

@@ -41,9 +41,9 @@ Visit [Elastic.co](http://www.elastic.co/guide/en/kibana/current/index.html) for
 
 For the daring, snapshot builds are available. These builds are created after each commit to the master branch, and therefore are not something you should run in production.
 
-| platform |  |  |  |  |
-| --- | --- | --- | --- | --- |
-| OSX | [tar](http://download.elastic.co/kibana/kibana-snapshot/kibana-5.0.0-snapshot-darwin-x64.tar.gz) | [zip](http://download.elastic.co/kibana/kibana-snapshot/kibana-5.0.0-snapshot-darwin-x64.zip) |  |  |
-| Linux x64 | [tar](http://download.elastic.co/kibana/kibana-snapshot/kibana-5.0.0-snapshot-linux-x64.tar.gz) | [zip](http://download.elastic.co/kibana/kibana-snapshot/kibana-5.0.0-snapshot-linux-x64.zip) | [deb](https://download.elastic.co/kibana/kibana-snapshot/kibana_5.0.0-snapshot_amd64.deb)| [rpm](https://download.elastic.co/kibana/kibana-snapshot/kibana-5.0.0_snapshot-1.x86_64.rpm) |
-| Linux x86 | [tar](http://download.elastic.co/kibana/kibana-snapshot/kibana-5.0.0-snapshot-linux-x86.tar.gz) | [zip](http://download.elastic.co/kibana/kibana-snapshot/kibana-5.0.0-snapshot-linux-x86.zip) | [deb](https://download.elastic.co/kibana/kibana-snapshot/kibana_5.0.0-snapshot_i386.deb) | [rpm](https://download.elastic.co/kibana/kibana-snapshot/kibana-5.0.0_snapshot-1.i386.rpm) |
-| Windows | [tar](http://download.elastic.co/kibana/kibana-snapshot/kibana-5.0.0-snapshot-windows.tar.gz) | [zip](http://download.elastic.co/kibana/kibana-snapshot/kibana-5.0.0-snapshot-windows.zip) |  |  |
+| platform |  |
+| --- | --- |
+| OSX | [tar](http://download.elastic.co/kibana/kibana-snapshot/kibana-5.0.0-snapshot-darwin-x64.tar.gz) |
+| Linux x64 | [tar](http://download.elastic.co/kibana/kibana-snapshot/kibana-5.0.0-snapshot-linux-x64.tar.gz) [deb](https://download.elastic.co/kibana/kibana-snapshot/kibana_5.0.0-snapshot_amd64.deb) [rpm](https://download.elastic.co/kibana/kibana-snapshot/kibana-5.0.0_snapshot-1.x86_64.rpm) |
+| Linux x86 | [tar](http://download.elastic.co/kibana/kibana-snapshot/kibana-5.0.0-snapshot-linux-x86.tar.gz) [deb](https://download.elastic.co/kibana/kibana-snapshot/kibana_5.0.0-snapshot_i386.deb) [rpm](https://download.elastic.co/kibana/kibana-snapshot/kibana-5.0.0_snapshot-1.i386.rpm) |
+| Windows | [zip](http://download.elastic.co/kibana/kibana-snapshot/kibana-5.0.0-snapshot-windows.zip) |