docs/download.html: cleanup and mention releases

<p>

The best way to obtain and update your own copy of buildroot is to fetch the

latest version using <a href="subversion.html">Subversion</a>.  You can also

obtain <a href= "downloads/snapshots/">Daily Snapshots</a> of the latest

buildroot source tree but cannot or do not wish to use Subversion (svn).

The latest release can always be dowloaded from

<a href="/downloads/">http://buildroot.uclibc.org/downloads/</a>.

<p>

You can also obtain <a href="/downloads/snapshots/">Daily

Snapshots</a> of the latest Buildroot source tree if you want to to

follow development, but cannot or do not wish to use Subversion (svn).

<ul>

	<li> Click here to <a href="downloads/snapshots/">Daily Snapshots</a>.