Minor stylistic corrections

Made "Famo.us" consistent throughout
Made serial list consistent, removing "by" before last item
Added hyphen to "fast-moving" as it modifies the following noun
Replace hyphens with em dash; remove repeated word
Make src/ folder reference consistent
CSS rules repeated

In the `.famous-group`, the following rules are repeated:
```css
    -webkit-transform-style: preserve-3d;
    transform-style: preserve-3d;
```
They are already declared in the rule `.famous-container, .famous-group`.
adjust stylesheet reference
Added correct description to Flipper example

Had description of grid view example.
fix alignment problem with content and buttons
update polyfills to 0.3.0 for grunt toolbelt
Added direction param in doc
fix typo in Changelog
Update doc generator
Added off method to EventEmitter which enables unbinding of multiple handlers (+1 squashed commit)
Squashed commits:
[a2eb66c] Added off method to EventEmitter which enables unbinding of multiple handlers