Clean up welcome page
First round of typographic treatement.
Merge branch 'master' of https://github.com/lambdahands/exercism.io
Merge pull request #2044 from lambdahands/master

First round of typographic treatment per #2038
Language on submission page is now a link
Added link to other submissions. Closes #2042
Move date submitted to header section
Add styleguide with KSS
Merge pull request #2050 from ErikSchierboom/links

Language on submission page is now a link
Merge pull request #2051 from ErikSchierboom/othersubmissions

Added link to other submissions. Closes #2042
Merge pull request #2054 from jalyna/exercism-styleguide

Add styleguide with KSS
Merge pull request #2052 from ErikSchierboom/cleanupsubmissionpage

Move date submitted to header section
Add a comment component for nits
Merge pull request #2055 from jalyna/add-comment-component

Add a comment component for nits
Clarify bin/console in README
Improve Design and Markup of Submission Page
Extract toolbar

Setup header

Setup iterations nav

Setup code section

Setup nitpicks
Merge pull request #2056 from jalyna/improve-submission-layout

Improve Design and Markup of Submission Page
Show badge with comments count

Fixes #2022
Merge pull request #2058 from jalyna/show-comments-on-iteration

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Add nits_receieved page

* Add acceptance tests for nits
* Link to nits receieved & given from nitstats page, not account page
* Standardize API endpoints:
  /nits/:username/stats
  /nits/:username/given
  /nits/:username/received
* Move ActiveRecord scopes from Routes to Comment model.
* For nits given, say: "Given to #{nitpick.submission.user}"
* For nits received, say: "Receieved from #{nitpick.user}"