Tokeniser Update

Hello everyone,

I am working on updating tokeniser to html5 current specs. Here is the associated link to branch https://github.com/Achal-Aggarwal/hibbub/tree/rewrite

If you want to test this use https://github.com/Achal-Aggarwal/hibbub/compare/rewrite.diff or https://github.com/Achal-Aggarwal/hibbub/compare/rewrite.patch

Feature tacker no. 2090 : http://bugs.netsurf-browser.org/mantis/view.php?id=2090

Note: Tokeniser code needs some polishing and tree builder must be updated before considering this to merge in master. 

Regards
Achal