#893 site design

I've updated the bower.json to include bootstrap as a dependency, the less for pouchdb css references the bower component so we can keep it outside the repo.
I've rewritten most of the structure also to encorporate a grid system, this allows us to scale properly which is important for mobile users.
### Build info
```bash
$ npm install -g less 
$ npm install -g bower
#at the root of the project
$ mkdir docs/static/css && lessc docs/static/less/pouchdb/pouchdb.less > docs/static/css/pouchdb.css
```