This reverts commit 3e991230.

# Conflicts:
#	app/models/project.rb

The logo is now rendered as pure SVG, rather than image referencing a
svg. The SVG has an id and the shapes of the logo have a shared class.
The shapes change their fill color on hover with a transition.

[ci skip]

Signed-off-by: NDmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Both new buttons are 64x64 renders of the recommended assets
from each company.

Refs for those are:

 - https://about.twitter.com/press/twitter-brand-policy
 - https://developers.google.com/identity/branding-guidelines

Addresses issue #544

adding avatar to project settings page added avatar removal show project avatar on dashboard, projects page, project page added rspec and feature tests added project avatar from repository new default project icon added added copying af avatar to forking of project added generated icon fixed avatar fork hound fix style fix test fix

I decided to create a fork of rouge as rouge lacks a HTML formatter with
the required options such as wrapping a line with <span> tags.
Furthermore I was not really convinced about the clarity of rouge's
source code.

Rugments 1.0.0beta3 for now only includes some basic linting and a new
HTML formatter. Everything else should behave the same.

Signed-off-by: NDmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Signed-off-by: NDmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>