Html5 doctype, CloudZoom, Facebook Open Graph, meta tags and CSS/LESS cleanup/improvements.

CSS cleanup and improvements on Product View page.
Overridden media.phtml to replaced Magento Zoom and More Views popup with CloudZoom.

Changed to HTML5 doctype. Overridden:
- 1column.phtml,
- 2columns-left.phtml
- 2columns-right.phtml
- 1column.phtml
- empty.phtml
- popup.phtml

Overridden head.phtml to do following changes:
- Removed <!--[if lt IE 7]> stuff.
- Added window.SKIN_URL javascript var (so it can be used by external js files)
- Added <meta name="SKYPE_TOOLBAR" content="SKYPE_TOOLBAR_PARSER_COMPATIBLE" /> so telephone numbers are not parsed by Skype
- Added Facebook Open Graph meta tags (og:title, og:type, og:url, og:image, og:site_name, og:description) on product page.
- Added meta viewport
- Added meta X-UA-Compatible

CSS improvements on page/page.less.
Added some variables in less/global.less and moved .transition() mixin to less/tool.less
Created less/tool.less with some lesscss mixins.
Local.xml, <tag_product_list>, added js and css assets.
Minor CSS improvements on page/pager.less.
Minor CSS improvements on catalog/product-list.less.
Minor fix on customer/account.less.
Updated jQuery to version 1.9.1.