Initial works on translation

I opted to John Resig's i18n-node-2 because it's very light weight. It's very simplistic when it comes to pluralisation and gender and it may cause trouble, but I think I can overcome this shortcomings.

ATM `pl` locale is hardcoded into `views/components/translate.coffee`. It should be configurable, but that is very low priority right now.
First translated strings in pl.js
Added moment view component

You can pass it Mongoose document, ObjectId or ordinary date and it will extracts timestamp from it. It prints moment.fromNow. Polish locale hardcoded ATM.
All components translated
FIX: typo in moment view component
All views translated

Also some icon related fixes.
0.9.0