[beta site] Adding a new beta message to the live website softly making all live users aware of the new beta site.
[beta site] removing the 'this is unfinished' message from the beta theme sine we have a link to it from the live site now
Fixing HTML validation
Switch back to full news posts on the beta homepage.

For an example of why this is necessary: http://d.pr/i/bdSi
[beta site] implementing betasite=1 or betasite=0 parameter. this keeps the banners setting working like the myphpnet_beta setting to give a consistent user experience without the need for beta=0 or beta=1.
[beta site] implementing betasite=1 or betasite=0 parameter. this keeps the banners setting working like the myphpnet_beta setting to give a consistent user experience without the need for beta=0 or beta=1.
Merge branch 'master' of git://git.php.net/web/php
Removing session usage because it's naughty