[trunk] Website Builder - HTML could be more compressed (minified)

[LisAndi - Andi Becker - http://lisandi.com]

The output of the HTML code is still to big and could be much more compressed using a minifier.

As the website builder is aimed for mobile use everything should be taken in account to reduce the transported data to an absolute minimum, which saves bandwidth and speeds up the site itself a lot.

i.e.
https://pypi.python.org/pypi/htmlmin

https://code.google.com/p/minify-everything/

for php5 we have very good results with:
https://code.google.com/p/minify/

Related: https://bugs.launchpad.net/openerp-web/+bug/1120321
Related: https://bugs.launchpad.net/openerp-web/+bug/1283905