WIP templates: new templates for Inspire

* Added header
* Added footer
* Added suport for LESS and Grunt tasks
* Added dependencies: bootstrap, jquery
* adapted to new code structure
* added icons, added search template
* support for font-awesome icons
* fixed the paths in gruntfile
* added the sample for search template
* search: added blogger and twitter feeds
* base: initial commit for static pages

Signed-off-by: Georgios Kokosioulis <georgios.kokosioulis@cern.ch>